http://bugs.winehq.org/show_bug.cgi?id=35347
--- Comment #13 from Sebastian Lackner sebastian@fds-team.de --- @Nikolay:
I have opened a bug report for it: https://bugreports.qt-project.org/browse/QTBUG-36446
Nevertheless I think my submitted wine patch wouldn't really hurt to stay compatible with systems that are shipped with a broken version. Not sure if/how fast QT pushes out updates. ;-) In never versions (QT >= 5.0) they have removed the whole QX11EmbedWidget completely.