Oops, my bad. Indeed I (accidentally) had left the root filesystem mounted readonly, after investigating another (unrelated) problem.
When I next logged in again, the apport applet popped up, to let me file this bug, but unfortunately, there was no easy way to see the contents of the report (DpkgTerminalLog.gz), which would have shown me that this report was entirely silly... Sorry for wasting your time like this. ** Changed in: ubuntu Status: New => Invalid -- package mailx 1:8.1.2-0.20070424cvs-1 failed to install/upgrade: unable to create `./usr/bin/mail' https://bugs.launchpad.net/bugs/137442 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs