After I used “Theme switcher” plugin for Quodlibet (audio player) and checked prefer dark theme version checkbox all GTK+ 3 applications except Quodlibet acquired such monstrous appearance as on the screen shot:http://www.zimagez.com/miniature/screenshot-121114-003650.php](http://www.zimagez.com/zimage/screenshot-121114-003650.php)
Disabling prefer dark theme version checkbox does not helped. Setting gtk-application-prefer-dark-theme option in ~/.config/gtk-3.0/settings.ini file to false does not help. If I disable that Quodlibet plugin Quodlibet also becomes dark and ugly.