Some progress: it seems to be caused by the overlay scrollbars. Anyone who still has the bug, can you try to start your application with the LIBOVERLAY_SCROLLBAR environment variable set to 0? For example to start vlc, you would type "LIBOVERLAY_SCROLLBAR=0 vlc" in your terminal.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805303 Title: Gtk-CRITICAL **: IA__gtk_widget_style_get: assertion `GTK_IS_WIDGET (widget)' failed with the default qt4 gui To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805303/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs