Wrong Calculation of ContainerPoint in Fancybox

[mfelsche]

Reproduce: Open a Leaflet map inside a Fancybox (http://fancyapps.com/fancybox/) when the browser is scrolled down (window.scrollY > 0). Doubleclick on a position in the map, the map will zoom to another point window.scrollY pixels far down south than the position just clicked.

Think this issue is somewhere around l.1723ff in dist/leaflet-src.js:

mouseEventToContainerPoint: function (e) { // (MouseEvent)
    return L.DomEvent.getMousePosition(e, this._container);
},

A Minimum-example will be attached: https://gist.github.com/4664568

[mfelsche]

This only affects Firefox 17/18, not current Safari or Chrome.

[joschka]

see #1365