Comment 26 for bug 1005677

While the current proposed fix resolves fine for vlc & calibre please check the effect on Thunderbird via overlay-scrollbar-gtk2
(crashreporter:15849): Gtk-CRITICAL **: gtk_scrolled_window_adjustment_changed: assertion `adjustment != NULL' failed

(crashreporter:15849): Gtk-CRITICAL **: IA__gtk_range_get_adjustment: assertion `GTK_IS_RANGE (range)' failed
ect.