The issue was caused by gdk-pixbuf being unable to recognize the file format of the theme image files (or of any image file).
This seems to have been caused by the creation of a /usr/local/share/applications directory and files in it with incorrect permissions by the Makefile of Anki 2.0.41 <https://apps.ankiweb.net/downloads/current/anki-2.0.41-amd64.tar.bz2> when run with sudo and an inappropriate umask (0027). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1663537 Title: window manager crashes on loading To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1663537/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs