This is not light-themes fault, I've seen this behavior since my first days with Ubuntu (9.04 then) so this is really an ancient bug since GTK+2. You can also see this behavior with other menus placed at bottom of screen, such as the theme selector combobox in Appearance panel of Control Center.
This is not light-themes fault, I've seen this behavior since my first days with Ubuntu (9.04 then) so this is really an ancient bug since GTK+2. You can also see this behavior with other menus placed at bottom of screen, such as the theme selector combobox in Appearance panel of Control Center.