I had the same issue, with a different theme. But I noticed that the locations in gtk.css were identical, so I searched for all instances of gtk.css on my computer.
~/.config/gtk-3.0/gtk.css had some errors in it for me, and I assume yours will be the same. Six times in the file, it will have a line that starts with "background- color", and then follow it up later in the line with "background- image"... but prior to "background-image", it should have had a semicolon (at the end of the prior text, before the tab), yet the semicolon was missing. Adding the missing semicolons has corrected the error. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1392669 Title: Gtk-WARNING **: Theme parsing error: gtk.css:40:48: Junk at end of value To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shimmer-themes/+bug/1392669/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs