Comment 1 for bug 1294219

I can reproduce with revision 460 of lp:webbrowser-app, which means that this regression is not a consequence of one of the recent changes in the app itself, but rather a consequence of the switch to Qt 5.2.

Note that this doesn’t necessarily mean that the bug is in Qt itself either: the thumbnailer uses private headers, so it may very well be that the code is incorrectly using Qt (as far as I can tell there has been changes in this code between Qt 5.0 and Qt 5.2).