change translate3d detection

src/core/Browser.js

@@ -35,6 +35,7 @@
 		android23: android23,
 		chrome: chrome,
 		safari: !chrome && ua.indexOf('safari') !== -1,
+		opera12: opera3d,
 
 		ie3d: ie3d,
 		webkit3d: webkit3d,

src/dom/DomUtil.js

@@ -141,7 +141,7 @@ L.DomUtil = {
 
 	setTransform: function (el, offset, scale) {
 		var pos = offset || new L.Point(0, 0),
-			is3d = L.Browser.webkit3d,
+			is3d = !L.Browser.opera12,
 			open = 'translate' + (is3d ? '3d' : '') + '(',
 			close = (is3d ? ',0' : '') + ')';