Description of problem: gnome-session[3819]: Gtk-WARNING: Theme parsing error: gtk-widgets-img.css:18:14: Theming engine 'unico' not found Version-Release number of selected component (if applicable): gnome-session-3.4.2-1.fc17.x86_64 How reproducible: Log in and/or start gnome-tweak-tool Actual results: See description Expected results: No such line Additional info: unico enigine is not available for download and as far as I can see I did not use a theme needing that engine.
gtk-unico-engine is but gtk-engine-unico isn't available