Which version of Ubuntu and of system-config-printer are you using? I have checked and both the versions of system-config-printer currently used by Utopic (14.10) and Vivid (15.04) depend on gir1.2-gtk-3.0.
Is it possible that when you installed gir1.2-gtk-3.0 that an older version of gir1.2-gtk-3.0 got replaced by a newer one? If yes, which was your old version and which the new version of gir1.2-gtk-3.0? ** Changed in: system-config-printer (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1398444 Title: Missing dependency on gir1.2-gtk-3.0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/system-config-printer/+bug/1398444/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs