* Disabled `Map``worldCopyJump` option by default (jumping back to the original world copy when panning out of it). Enable it explicitly if you need it.
* Added touch zoom, pan and double tap support for **IE10 touch devices and Metro apps** (by [@danzel](https://github.com/danzel) and [@veproza](https://github.com/veproza) with help from [@oliverheilig](https://github.com/oliverheilig)). [#1076](https://github.com/Leaflet/Leaflet/pull/1076) [#871](https://github.com/Leaflet/Leaflet/issues/871)
* Improved zoom animation curve for a better feel overall.
* Improved scroll wheel zoom to be more responsive.
* Improved panning animation performance in IE6-8.
##### Controls
* **Improved zoom control design** to look better, more neutral and in line with other controls, making it easier to customize and fit different website designs. Replaced +/- images with text.
* Added **retina support for markers** (through `Icon``iconRetinaUrl` and `shadowRetinaUrl` options) (by [@danzel](https://github.com/danzel)). [#1048](https://github.com/Leaflet/Leaflet/issues/1048) [#1174](https://github.com/Leaflet/Leaflet/pull/1174)
* Added retina-sized default marker icon in addition to standard one (along with its SVG source and with some subtle design improvements) (by [@danzel](https://github.com/danzel)). [#1048](https://github.com/Leaflet/Leaflet/issues/1048) [#1174](https://github.com/Leaflet/Leaflet/pull/1174)
* Added `Class``addInitHook` method for **adding constructor hooks to any classes** (great extension point for plugin authors). [#1123](https://github.com/Leaflet/Leaflet/issues/1123)
* Improved markers and vectors click event so that it propagates to map if no one is listening to it (by [@danzel](https://github.com/danzel)). [#834](https://github.com/Leaflet/Leaflet/issues/834) [#1033](https://github.com/Leaflet/Leaflet/pull/1033)
* Added `Marker``riseOnHover` and `riseOffset` options (for bringing markers to front on hover, disabled by default) (by [jacobtoye](https://github.com/jacobtoye)). [#914](https://github.com/Leaflet/Leaflet/pull/914) [#920](https://github.com/Leaflet/Leaflet/issues/920)
* Improved `Control.Layers` to support HTML in layer names (by [@aparshin](https://github.com/aparshin)). [#1055](https://github.com/Leaflet/Leaflet/pull/1055) [#1099](https://github.com/Leaflet/Leaflet/issues/1099)
* Added `CRS.Simple` to the list of built-in CRS and improved it to be more usable out of the box (it has different default scaling and transformation now), see `debug/map/simple-proj.html` for an example.
* Removed `Browser``ua`, `gecko`, `opera` properties (no longer needed).
* Fixed a bug where slight touchpad scrolling or one-wheel scrolling wouln't always perform zooming. [#1039](https://github.com/Leaflet/Leaflet/issues/1039)
* Fixed a bug where `panBy` wouldn't round the offset values (so it was possible to make the map blurry with it). [#1085](https://github.com/Leaflet/Leaflet/issues/1085)
* Fixed a regression where WMS tiles wouldn't wrap on date lines. [#970](https://github.com/Leaflet/Leaflet/issues/970)
* Fixed a bug where mouse interaction was affected by map container border width (by [@mohlendo](https://github.com/mohlendo)). [#1204](https://github.com/Leaflet/Leaflet/issues/1205) [#1205](https://github.com/Leaflet/Leaflet/pull/1205)
* Fixed a bug with weird vector zoom animation when using Canvas for rendering (by [@danzel](https://github.com/danzel)). [#1187](https://github.com/Leaflet/Leaflet/issues/1187) [#1188](https://github.com/Leaflet/Leaflet/pull/1188)
* Fixed a bug where max bounds limitation didn't work when navigating the map with a keyboard (by [@snkashis](https://github.com/snkashis)). [#989](https://github.com/Leaflet/Leaflet/issues/989) [#1221](https://github.com/Leaflet/Leaflet/pull/1221)
* Fixed a bug where `TileLayer``bringToBack` didn't work properly in some cases (by [@danzel](https://github.com/danzel)). [#963](https://github.com/Leaflet/Leaflet/pull/963) [#959](https://github.com/Leaflet/Leaflet/issues/959)
* Fixed a bug where removing a tile layer while dragging would throw an error (by [@danzel](https://github.com/danzel)). [#965](https://github.com/Leaflet/Leaflet/issues/965) [#968](https://github.com/Leaflet/Leaflet/pull/968)
* Fixed a bug where middle marker wasn't removed after deleting 2 end nodes from a polyline (by [@Svad](https://github.com/Svad)). [#1022](https://github.com/Leaflet/Leaflet/issues/1022) [#1023](https://github.com/Leaflet/Leaflet/pull/1023)
* Fixed a bug where `Map``load` event happened too late (after `moveend`, etc.) (by [@jfirebaugh](https://github.com/jfirebaugh)). [#1027](https://github.com/Leaflet/Leaflet/pull/1027)
* Fixed `Circle``getBounds` to return correct bounds and work without adding the circle to a map. [#1068](https://github.com/Leaflet/Leaflet/issues/1068)
* Fixed a bug where removing `Popup` on `viewreset` throwed an error (by [fnicollet](https://github.com/fnicollet) and [@danzel](https://github.com/danzel)). [#1098](https://github.com/Leaflet/Leaflet/pull/1098) [#1094](https://github.com/Leaflet/Leaflet/issues/1094)
* Fixed a bug where `GeoJSON``resetStyle` would not fully reset a layer to its default style. [#1112](https://github.com/Leaflet/Leaflet/issues/1112)
* Fixed a bug that caused infinite recursion when using `latLngBounds` factory with coordinates as string values. [#933](https://github.com/Leaflet/Leaflet/issues/933)
* Fixed chaining on `Marker``setIcon`, `setZIndexOffset`, `update` methods. [#1176](https://github.com/Leaflet/Leaflet/issues/1176)
* Fixed a bug with mouse interaction when the map container contained children with position other than absolute. [#278](https://github.com/Leaflet/Leaflet/issues/278)
* Fixed a bug with fill/stroke opacity conflicts when using Canvas for rendering (by [@danzel](https://github.com/danzel)). [#1186](https://github.com/Leaflet/Leaflet/issues/1186) [#1889](https://github.com/Leaflet/Leaflet/pull/1189)
* Fixed a bug where `FeatureGroup``bindPopup` didn't take options into account.
* Fixed a bug where Canvas-based vector layers didn't cleanup click event on removal properly (by [@snkashis](https://github.com/snkashis)). [#1006](https://github.com/Leaflet/Leaflet/issues/1006) [#1273](https://github.com/Leaflet/Leaflet/pull/1273)
* Fixed a bug where `CircleMarker``setStyle` didn't take `radius` into account (by [@fdlk](https://github.com/fdlk)). [#1012](https://github.com/Leaflet/Leaflet/issues/1012) [#1013](https://github.com/Leaflet/Leaflet/pull/1013)
* Fixed a bug where null GeoJSON geometries would throw an error instead of skipping (by [@brianherbert](https://github.com/brianherbert)). [#1240](https://github.com/Leaflet/Leaflet/pull/1240)
* Fixed a bug where Canvas-based vector layers passed incorrect `layer` event property on click (by [@snkashis](https://github.com/snkashis)). [#1215](https://github.com/Leaflet/Leaflet/issues/1215) [#1243](https://github.com/Leaflet/Leaflet/pull/1243)
* Fixed a bug where `TileLayer.WMS` didn't work correctly if the base URL contained query parameters (by [@snkashis](https://github.com/snkashis)). [#973](https://github.com/Leaflet/Leaflet/issues/973) [#1231](https://github.com/Leaflet/Leaflet/pull/1231)
* Fixed a bug where removing a polyline in editing state wouldn't clean up the editing handles (by [@mehmeta](https://github.com/mehmeta)). [#1233](https://github.com/Leaflet/Leaflet/pull/1233)
* Fixed a bug where removing a vector layer with a bound popup wouldn't clean up its click event properly (by [@yohanboniface](https://github.com/yohanboniface)). [#1229](https://github.com/Leaflet/Leaflet/pull/1229)
* Fixed a bug where `GeoJSON` features with `GeometryCollection` didn't pass properties to `pointToLayer` function (by [@calvinmetcalf](https://github.com/calvinmetcalf)). [#1097](https://github.com/Leaflet/Leaflet/pull/1097)
* Fixed a bug where "Not implemented" error sometimes appeared in IE6-8 (by [@bryguy](https://github.com/bryguy) and [@lookfirst](https://github.com/lookfirst)). [#892](https://github.com/Leaflet/Leaflet/issues/892) [#893](https://github.com/Leaflet/Leaflet/pull/893)
* Fixed compatibility with SmoothWheel extension for Firefox (by [@waldir](https://github.com/waldir)). [#1011](https://github.com/Leaflet/Leaflet/pull/1011)
* Fixed a bug with popup layout in IE6-7 (by [@danzel](https://github.com/danzel)). [#1117](https://github.com/Leaflet/Leaflet/issues/1117)
* Fixed a bug with incorrect box zoom opacity in IE6-7 (by [@jacobtoye](https://github.com/jacobtoye)). [#1072](https://githubcom/Leaflet/Leaflet/pull/1072)
* Fixed a bug with box zoom throwing a JS error in IE6-7 (by [@danzel](https://github.com/danzel)). [#1071](https://github.com/Leaflet/Leaflet/pull/1071)
* Fixed array type checking in the code to be more consistent in a cross-frame environment (by [@oslek](https://github.com/oslek)). [#1279](https://github.com/Leaflet/Leaflet/pull/1279)
* Fixed a bug with `-` key not working in Firefox 15+ (thanks to [@mattesCZ](https://github.com/mattesCZ)). [#869](https://github.com/Leaflet/Leaflet/issues/869)
* Fixed a bug with **wonky zoom animation in IE10** (by [@danzel](https://github.com/danzel)). [#1007](https://github.com/Leaflet/Leaflet/pull/1007)
* Fixed a bug with **wonky zoom animation in Chrome 23+** (by [@danzel](https://github.com/danzel)). [#1060](https://github.com/Leaflet/Leaflet/pull/1060) [#1056](https://github.com/Leaflet/Leaflet/issues/1056)
* Fixed a bug where tiles sometimes disappeared on initial map load on Android 2/3 (by [@danzel](https://github.com/danzel)). [#868](https://github.com/Leaflet/Leaflet/pull/868)
* Fixed a bug where layers control radio buttons would not work correctly in IE7 (by [@danzel](https://github.com/danzel)). [#862](https://github.com/Leaflet/Leaflet/pull/862)
* Fixed a bug where `FeatureGroup``removeLayer` would unbind popups of removed layers even if the popups were not put by the group (affected [Leaflet.markercluster](https://github.com/danzel/Leaflet.markercluster) plugin) (by [@danzel](https://github.com/danzel)). [#861](https://github.com/Leaflet/Leaflet/pull/861)
Leaflet 0.4 contains several API improvements that allow simpler, jQuery-like syntax ([example](https://gist.github.com/3038879)) while being backwards compatible with the previous approach (so you can use both styles):
* Improved most methods and options to accept `LatLng`, `LatLngBounds`, `Point` and `Bounds` values in an array form (e.g. `map.panTo([lat, lng])` will be the same as `map.panTo(new L.LatLng(lat, lng))`)
* Added `addTo` method to all layer classes, e.g. `marker.addTo(map)` is equivalent to `map.addLayer(marker)`
* Added factory methods to most classes to be able to write code without `new` keyword, named the same as classes but starting with a lowercase letter, e.g. `L.map('map')` is the same as `new L.Map('map')`
* Improved zooming so that you don't get a blank map when you zoom in or out twice quickly (by [@danzel](https://github.com/danzel)). [#7](https://github.com/Leaflet/Leaflet/issues/7) [#729](https://github.com/Leaflet/Leaflet/pull/729)
* Drag-panning now works even when there are markers in the starting point (helps on maps with lots of markers). [#506](https://github.com/Leaflet/Leaflet/issues/506)
* Added `TileLayer``detectRetina` option (`false` by default) that makes tiles show in a higher resolution on iOS retina displays (by [@Mithgol](https://github.com/Mithgol)). [#586](https://github.com/Leaflet/Leaflet/pull/586)
GeoJSON API was improved to be simpler and more flexible ([example](https://gist.github.com/3062900)). The changes are not backwards-compatible, so be sure to update your old code.
* Added `style` option for styling vector layers, passed either as an object or as a function (to style vector layers according to GeoJSON properties).
* Added `filter` option to leave out features that don't correspond to a certain criteria (e.g. based on properties).
* Added `onEachFeature` option to execute certain code on each feature layer based on its properties (binding popups, etc).
* Changed `pointToLayer` function signature to provide `geojson` in addition to `latlng` when creating point features for more flexibility.
Icon API was improved to be more flexible, but one of the changes is backwards-incompatible: you now need to pass different icon properties (like `iconUrl`) inside an options object ([example](https://gist.github.com/3076084)).
* Converted `Icon` properties to options, changed constructor signature to `Icon(options)`.
* Made all `Icon` options except `iconUrl` optional (if not specified, they'll be chosen automatically or implemented using CSS). Anchor is centered by default (if size is specified), and otherwise can be set through CSS using negative margins.
* Improved `on` and `off` methods to also accept `(eventHash[, context])`, as well as multiple space-separated events (by [@Guiswa](https://github.com/Guiswa)). [#770](https://github.com/Leaflet/Leaflet/pull/770)
* Improved `off` to remove all listeners of the event if no function was specified (by [@Guiswa](https://github.com/Guiswa)). [#770](https://github.com/Leaflet/Leaflet/pull/770) [#691](https://github.com/Leaflet/Leaflet/issues/691)
* Added `TileLayer``setZIndex` method for controlling the order of tile layers (thanks to [@mattcurrie](https://github.com/mattcurrie)). [#837](https://github.com/Leaflet/Leaflet/pull/837)
* Added `bringToFront` and `bringToBack` methods to `TileLayer`, `ImageOverlay` and vector layers. [#185](https://github.com/Leaflet/Leaflet/issues/185) [#505](https://github.com/Leaflet/Leaflet/issues/505)
* Added `TileLayer``loading` event that fires when its tiles start to load (thanks to [@lapinos03](https://github.com/lapinos03)). [#177](https://github.com/Leaflet/Leaflet/issues/177)
* Added `TileLayer.WMS``setParams` method for setting WMS parameters at runtime (by [@greeninfo](https://github.com/greeninfo)). [#719](https://github.com/Leaflet/Leaflet/issues/719)
* Added `TileLayer.WMS` subdomain support (`{s}` in the url) (by [@greeninfo](https://github.com/greeninfo)). [#735](https://github.com/Leaflet/Leaflet/issues/735)
* Added `originalEvent` property to `MouseEvent` (by [@k4](https://github.com/k4)). [#521](https://github.com/Leaflet/Leaflet/pull/521)
* Added `containerPoint` property to `MouseEvent`. [#413](https://github.com/Leaflet/Leaflet/issues/413)
* Added `contextmenu` event to vector layers (by [@ErrorProne](https://github.com/ErrorProne)). [#500](https://github.com/Leaflet/Leaflet/pull/500)
* Added `L_NO_TOUCH` global variable switch (set it before Leaflet inclusion) which disables touch detection, helpful for desktop apps built using QT. [#572](https://github.com/Leaflet/Leaflet/issues/572)
* Added `dashArray` option to vector layers for making dashed strokes (by [jacobtoye](https://github.com/jacobtoye)). [#821](https://github.com/Leaflet/Leaflet/pull/821) [#165](https://github.com/Leaflet/Leaflet/issues/165)
* Added `LatLngBounds``pad` method that returns bounds extended by a percentage (by [@jacobtoye](https://github.com/jacobtoye)). [#492](https://github.com/Leaflet/Leaflet/pull/492)
* Fixed a bug where the map was zooming incorrectly inside a `position: fixed` container (by [@chx007](https://github.com/chx007)). [#602](https://github.com/Leaflet/Leaflet/pull/602)
* Fixed a bug where scaled tiles weren't cleared up after zoom in some cases (by [@cfis](https://github.com/cfis)) [#683](https://github.com/Leaflet/Leaflet/pull/683)
* Fixed a bug where map wouldn't drag over a polygon with a `mousedown` listener. [#834](https://github.com/Leaflet/Leaflet/issues/834)
* Fixed a regression where removeLayer would not remove corresponding attribution. [#488](https://github.com/Leaflet/Leaflet/issues/488)
* Fixed a bug where popup close button wouldn't work on manually added popups. [#423](https://github.com/Leaflet/Leaflet/issues/423)
* Fixed a bug where marker click event would stop working if you dragged it and then disabled dragging. [#434](https://github.com/Leaflet/Leaflet/issues/434)
* Fixed a bug where vector layer `setStyle({stroke: false})` wouldn't remove stroke and the same for fill. [#441](https://github.com/Leaflet/Leaflet/issues/441)
* Fixed a bug where `TileLayer``load` event wasn't fired if some tile didn't load (by [@lapinos03](https://github.com/lapinos03) and [@cfis](https://github.com/cfis)) [#682](https://github.com/Leaflet/Leaflet/pull/682)
* Fixed error when removing `GeoJSON` layer. [#685](https://github.com/Leaflet/Leaflet/issues/685)
* Fixed error when calling `GeoJSON``clearLayer` (by [@runderwood](https://github.com/runderwood)). [#617](https://github.com/Leaflet/Leaflet/pull/617)
* Fixed a bug where `Control``setPosition` wasn't always working correctly (by [@ericmmartinez](https://github.com/ericmmartinez)). [#657](https://github.com/Leaflet/Leaflet/pull/657)
* Fixed a bug with `Util.bind` sometimes losing arguments (by [@johtso](https://github.com/johtso)). [#588](https://github.com/Leaflet/Leaflet/pull/588)
* Fixed a bug where `drag` event was sometimes fired after `dragend`. [#555](https://github.com/Leaflet/Leaflet/issues/555)
* Fixed a bug where `TileLayer``load` event was firing only once (by [@lapinos03](https://github.com/lapinos03) and [shintonik](https://github.com/shintonik)). [#742](https://github.com/Leaflet/Leaflet/pull/742) [#177](https://github.com/Leaflet/Leaflet/issues/177)
* Fixed a bug where `FeatureGroup` popup events where not cleaned up after removing a layer from it (by [@danzel](https://github.com/danzel)). [#775](https://github.com/Leaflet/Leaflet/pull/775)
* Fixed a bug where `DomUtil.removeClass` didn't remove trailing spaces (by [@jieter](https://github.com/jieter)). [#784](https://github.com/Leaflet/Leaflet/pull/784)
* Fixed a bug where `LayerGroup``addLayer` wouldn't check if a layer has already been added (by [@danzel](https://github.com/danzel)). [798](https://github.com/Leaflet/Leaflet/pull/798)
* Fixed a bug that broke Leaflet for websites that had XHTML content-type header set (by [lars-sh](https://github.com/lars-sh)). [#801](https://github.com/Leaflet/Leaflet/pull/801)
* Fixed a bug that caused popups to be empty in IE when passing a DOM node as the content (by [@nrenner](https://github.com/nrenner)). [#472](https://github.com/Leaflet/Leaflet/pull/472)
* Fixed a bug where clickable paths on IE9 didn't have a hand cursor (by [naehrstoff](https://github.com/naehrstoff)). [#671](https://github.com/Leaflet/Leaflet/pull/671)
* Fixed a bug in IE with disappearing icons when changing opacity (by [@tagliala](https://github.com/tagliala) and [DamonOehlman](https://github.com/DamonOehlman)). [#667](https://github.com/Leaflet/Leaflet/pull/667) [#600](https://github.com/Leaflet/Leaflet/pull/600)
* Fixed a bug with setting opacity on IE10 (by [@danzel](https://github.com/danzel)). [796](https://github.com/Leaflet/Leaflet/pull/796)
* Fixed a bug where `Control.Layers` didn't work on IE7. [#652](https://github.com/Leaflet/Leaflet/issues/652)
* Fixed a bug that could cause false `mousemove` events on click in Chrome (by [@stsydow](https://github.com/stsydow)). [#757](https://github.com/Leaflet/Leaflet/pull/757)
* Fixed a bug in IE6-8 where adding fill or stroke on vector layers after initialization with `setStyle` would break the map. [#641](https://github.com/Leaflet/Leaflet/issues/641)
* Fixed a bug with setOpacity in IE where it would not work correctly if used more than once on the same element (by [@ajbeaven](https://github.com/ajbeaven)). [#827](https://github.com/Leaflet/Leaflet/pull/827)
* Fixed a bug in Chrome where transparent control corners sometimes couldn't be clicked through (by [@danzel](https://github.com/danzel)). [#836](https://github.com/Leaflet/Leaflet/pull/836) [#575](https://github.com/Leaflet/Leaflet/issues/575)
* Fixed a bug that sometimes caused map to disappear completely after zoom on iOS (by [@fr1n63](https://github.com/fr1n63)). [#580](https://github.com/Leaflet/Leaflet/issues/580) [#777](https://github.com/Leaflet/Leaflet/pull/777)
* Fixed a bug that often caused vector layers to flicker on drag end on iOS (by [@krawaller](https://github.com/krawaller)). [#18](https://github.com/Leaflet/Leaflet/issues/18)
* Fixed a bug with false map click events on pinch-zoom and zoom/layers controls click. [#485](https://github.com/Leaflet/Leaflet/issues/485)
* Fixed a bug where zoom control wasn't always visible on Android 3. [#335](https://github.com/Leaflet/Leaflet/issues/335)
* Fixed a bug where opening the layers control would propagate a click to the map (by [@jacobtoye](https://github.com/jacobtoye)). [#638](https://github.com/Leaflet/Leaflet/pull/638)
* Fixed a bug where `ImageOverlay` wouldn't stretch properly on zoom on Android 2. [#651](https://github.com/Leaflet/Leaflet/issues/651)
* Fixed a bug where `clearLayers` for vector layers on a Canvas backend (e.g. on Android 2) would take unreasonable amount of time. [#785](https://github.com/Leaflet/Leaflet/issues/785)
* Fixed a bug where `setLatLngs` and similar methods on vector layers on a Canvas backend would not update the layers immediately. [#732](https://github.com/Leaflet/Leaflet/issues/732)
* Added **Canvas backend** for vector layers (polylines, polygons, circles). This enables vector support on Android <3,anditcanalsobeoptionallypreferredoverSVGforaperformancegaininsomecases.Thanksto [@florianf](https://github.com/florianf) forabigpartofthiswork.
* When panning to another copy of the world (that's infinite horizontally), map overlays now jump to corresponding positions. [#273](https://github.com/Leaflet/Leaflet/issues/273)
* Limited maximum zoom change on a single mouse wheel movement (so you won't zoom across the whole zoom range in one scroll). [#149](https://github.com/Leaflet/Leaflet/issues/149)
* Added `urlParams` third optional argument to `TileLayer` constructor for convenience: an object with properties that will be evaluated in the URL template.
* Added `Polyline``closestLayerPoint` method that's can be useful for interaction features (by [@anru](https://github.com/anru)). [#186](https://github.com/Leaflet/Leaflet/pull/186)
* Added `setLatLngs` method to `MultiPolyline` and `MultiPolygon` (by [@anru](https://github.com/anru)). [#194](https://github.com/Leaflet/Leaflet/pull/194)
* Added `getBounds` method to `Polyline` and `Polygon` (by [@JasonSanford](https://github.com/JasonSanford)). [#253](https://github.com/Leaflet/Leaflet/pull/253)
* Added `getBounds` method to `FeatureGroup` (by [@JasonSanford](https://github.com/JasonSanford)). [#557](https://github.com/Leaflet/Leaflet/pull/557)
* Added `FeatureGroup``setStyle` method (also inherited by `MultiPolyline` and `MultiPolygon`). [#353](https://github.com/Leaflet/Leaflet/issues/353)
* Added `minWidth` option to `Popup` (by [@marphi](https://github.com/marphi)). [#214](https://github.com/Leaflet/Leaflet/pull/214)
* Improved `LatLng` constructor to be more tolerant (and throw descriptive error if latitude or longitude can't be interpreted as a number). [#136](https://github.com/Leaflet/Leaflet/issues/136)
* Added `LatLng``distanceTo` method (great circle distance) (by [@mortenbekditlevsen](https://github.com/mortenbekditlevsen)). [#462](https://github.com/Leaflet/Leaflet/pull/462)
* Added `LatLngBounds``toBBoxString` method for convenience (by [@JasonSanford](https://github.com/JasonSanford)). [#263](https://github.com/Leaflet/Leaflet/pull/263)
* Added `LatLngBounds``intersects(otherBounds)` method (thanks to [@pagameba](https://github.com/pagameba)). [#350](https://github.com/Leaflet/Leaflet/pull/350)
* Made `LatLngBounds``extend` method to accept other `LatLngBounds` in addition to `LatLng` (by [@JasonSanford](https://github.com/JasonSanford)). [#553](https://github.com/Leaflet/Leaflet/pull/553)
* Improved superclass access mechanism to work with inheritance chains of 3 or more classes; now you should use `Klass.superclass` instead of `this.superclass` (by [@anru](https://github.com/anru)). [#179](https://github.com/Leaflet/Leaflet/pull/179)
* Added `Map``boxzoomstart` and `boxzoomend` events (by [@zedd45](https://github.com/zedd45)). [#554](https://github.com/Leaflet/Leaflet/pull/554)
* Fixed a bug where `Circle` was rendered with incorrect radius (didn't take projection exagerration into account). [#331](https://github.com/Leaflet/Leaflet/issues/331)
* Fixed a bug where `Map``getBounds` would work incorrectly on a date line cross. [#295](https://github.com/Leaflet/Leaflet/issues/295)
* Fixed a bug where polygons and polylines sometimes rendered incorrectly on some zoom levels. [#381](https://github.com/Leaflet/Leaflet/issues/381)
* Fixed a bug where `GeoJSON``pointToLayer` option wouldn't work in a `GeometryCollection`. [#391](https://github.com/Leaflet/Leaflet/issues/391)
* Fixed a bug with incorrect rendering of GeoJSON on a date line cross. [#354](https://github.com/Leaflet/Leaflet/issues/354)
* Fixed a bug where map panning would stuck forever after releasing the mouse over an iframe or a flash object (thanks to [@sten82](https://github.com/sten82)). [#297](https://github.com/Leaflet/Leaflet/pull/297) [#64](https://github.com/Leaflet/Leaflet/issues/64)
* Fixed a bug where mouse wheel zoom worked incorrectly if map is inside scrolled container (partially by [@chrillo](https://github.com/chrillo)). [#206](https://github.com/Leaflet/Leaflet/issues/206)
* Fixed a bug where it was possible to add the same listener twice. [#281](https://github.com/Leaflet/Leaflet/issues/281)
* Fixed a bug where `Circle` was rendered with incorrect radius (didn't take projection exaggeration into account). [#331](https://github.com/Leaflet/Leaflet/issues/331)
* Fixed a bug where `Marker``setIcon` was not working properly (by [@marphi](https://github.com/marphi)). [#218](https://github.com/Leaflet/Leaflet/pull/218) [#311](https://github.com/Leaflet/Leaflet/issues/311)
* Fixed a bug where `Marker``setLatLng` was not working if it's set before adding the marker to a map. [#222](https://github.com/Leaflet/Leaflet/issues/222)
* Fixed a bug where marker popup would not move on `Marker``setLatLng` (by [@tjarratt](https://github.com/tjarratt)). [#272](https://github.com/Leaflet/Leaflet/pull/272)
* Fixed a bug that caused en error when dragging marker with icon without shadow (by [@anru](https://github.com/anru)). [#178](https://github.com/Leaflet/Leaflet/issues/178)
* Fixed a typo in `Bounds``contains` method (by [@anru](https://github.com/anru)). [#180](https://github.com/Leaflet/Leaflet/pull/180)
* Fixed a bug where drag event fired before the actual movement of layer (by [@anru](https://github.com/anru)). [#197](https://github.com/Leaflet/Leaflet/pull/197)
* Fixed a bug where map click caused an error if dragging is initially disabled. [#196](https://github.com/Leaflet/Leaflet/issues/196)
* Fixed a bug where `TileLayer``load` event wouldn't fire in some edge cases (by [@dravnic](https://github.com/dravnic)).
* Fixed a bug related to clearing background tiles after zooming (by [@neno-giscloud](https://github.com/neno-giscloud) & [@dravnic](https://github.com/dravnic)).
* Fixed a bug related to cleaning up after removing tile layers (by [@dravnic](https://github.com/dravnic)). [#276](https://github.com/Leaflet/Leaflet/pull/276)
* Fixed a bug that made selecting text in the attribution control impossible. [#279](https://github.com/Leaflet/Leaflet/issues/279)
* Fixed a bug when initializing a map in a non-empty div. [#278](https://github.com/Leaflet/Leaflet/issues/278)
* Fixed a bug in Elliptical Mercator formula that affeted `EPSG:3395` CRS (by [@Savvkin](https://github.com/Savvkin)). [#358](https://github.com/Leaflet/Leaflet/pull/358)
* Fixed occasional crashes on Mac Safari (thanks to [@lapinos03](https://github.com/lapinos03)). [#191](https://github.com/Leaflet/Leaflet/issues/191)
* Fixed a bug where resizing the map would sometimes make it blurry on WebKit (by [@mortenbekditlevsen](https://github.com/mortenbekditlevsen)). [#453](https://github.com/Leaflet/Leaflet/pull/453)
* Fixed a bug that raised error in IE6-8 when clicking on popup close button. [#235](https://github.com/Leaflet/Leaflet/issues/235)
* Fixed a bug with Safari not redrawing UI immediately after closing a popup. [#296](https://github.com/Leaflet/Leaflet/issues/296)
* Fixed a bug that caused performance drop and high CPU usage when calling `setView` or `panTo` to the current center. [#231](https://github.com/Leaflet/Leaflet/issues/231)
* Fixed a bug that caused an error when clicking vector layers under iOS. [#204](https://github.com/Leaflet/Leaflet/issues/204)
* Fixed crash on Android 3+ when panning or zooming (by [@florian](https://github.com/florianf)). [#137](https://github.com/Leaflet/Leaflet/issues/137)
* Fixed a bug on Android 2/3 that sometimes caused the map to disappear after zooming. [#69](https://github.com/Leaflet/Leaflet/issues/69)
* Added different **projections** support, having `EPSG:3857`, `EPSG:4326` and `EPSG:3395` out of the box (through `crs` option in `Map`). Thanks to [@Miroff](https://github.com/Miroff) & [@Komzpa](https://github.com/Komzpa) for great advice and explanation regarding this.
* Improved panning performance in Chrome and FF considerably with the help of `requestAnimationFrame`. [#130](https://github.com/Leaflet/Leaflet/issues/130)
* Improved click responsiveness in mobile WebKit (now it happens without delay). [#26](https://github.com/Leaflet/Leaflet/issues/26)
* Fixed a bug where zooming is broken if the map contains a polygon and you zoom to an area where it's not visible. [#47](https://github.com/Leaflet/Leaflet/issues/47)
* Fixed a bug where marker that was added, removed and then added again would not appear on the map. [#66](https://github.com/Leaflet/Leaflet/issues/66)
* Fixed a bug that prevented panning on some Android 2.1 (and possibly older) devices. [#84](https://github.com/Leaflet/Leaflet/issues/84)
* Disabled zoom animation on Android by default because it's buggy on some devices (will be enabled back when it's stable enough). [#32](https://github.com/Leaflet/Leaflet/issues/32)
* Fixed a bug where map would occasionally break while multi-touch-zooming on iOS. [#32](https://github.com/Leaflet/Leaflet/issues/32)
* Fixed a bug that prevented panning/clicking on Android 3 tablets. [#121](https://github.com/Leaflet/Leaflet/issues/121)
* Fixed a bug that prevented panning/clicking on Opera Mobile. [#138](https://github.com/Leaflet/Leaflet/issues/138)
* Fixed potentional memory leak on WebKit when removing tiles, thanks to [@Scalar4eg](https://github.com/Scalar4eg). [#107](https://github.com/Leaflet/Leaflet/issues/107)