GNOME Bugzilla – Bug 746707
Faulty background color/transparency in "About" dialog
Last modified: 2015-03-25 00:33:55 UTC
Open the Help->About dialog of a Gtk+ app, e.g. gnome-terminal, gedit, evince... Some text appears over the default gray background. Click on the Credits or License button. New text appears on white. Now click on this button again to close the info that just appeared. Expected behivior: The initial look of the About dialog should be restored. Actual behavior: The foreground text is there, but the background becomes black (Ubuntu Utopic, gtk-3.12.2) or transparent (Ubuntu Vivid beta, gtk-3.14.9). If the dialog is closed and opened again, it'll be faulty right away for the rest of the app's lifetime. You have to restart the application to make it show correctly again. Tested both with Gnome-shell and Unity; and both with Adwaita and Ambiance. In case of gnome-terminal, both with and without the unofficial transparency patch.
That is not happening here. I'll be bold and blame Ubuntus popup scrollbars for this...
Nice guess, thanks :) Indeed, LIBOVERLAY_SCROLLBAR=0 makes the bug go away. I'll report it to them.