I'me the reporter of bug #894341, which I think it is the same. In the attachment there are the log from gdb as suggested by Sebastien, the /var/log/cups/error_log as suggested in comment 2, and my the ppd from lexmark (I use this because in the one shipped with ubuntu some settings are missing)
** Attachment added: "gdb-gnome-settings-daemon.txt" https://bugs.launchpad.net/ubuntu/+source/cups/+bug/893676/+attachment/2612713/+files/gdb-gnome-settings-daemon.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/893676 Title: Cups disrupts unity window theme To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cups/+bug/893676/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs