> QStackedLayout::setCurrentWidget: Widget 0x18d3750 not contained in stack
> libpng warning: Ignoring attempt to set cHRM RGB triangle with zero area
> Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `GtkWidget::visited-link-color' of type `GdkColor' from rc file value "((GString*) 0x24b22e0)" of type `GString'
There are warning messages, but not indicators of errors. I suspect that upgrading has given you a lousy OpenGL driver. These types of artifacts are typical of driver issues on Windows and Linux.