Running `dpkg --configure -a` manually appears to have resolved the problem:
$ sudo dpkg --configure -a Setting up xulrunner-1.9.2 (1.9.2.28+build1+nobinonly-0ubuntu0.11.04.1) ... Processing triggers for libc-bin ... ldconfig deferred processing now taking place $ sudo dpkg --configure -a $ aptitude show xulrunner-1.9.2 Package: xulrunner-1.9.2 New: yes State: installed; will be removed because nothing depends on it [...] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1025568 Title: package xulrunner-1.9.2 1.9.2.28+build1+nobinonly-0ubuntu0.11.04.1 failed to install/upgrade: ErrorMessage: subprocess installed post- installation script returned error exit status 143 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xulrunner-1.9.2/+bug/1025568/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs