I think it was fixed in Debian: https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=732410
** Bug watch added: Debian Bug tracker #732410 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=732410 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1055551 Title: zsh can causes ps to generate error message To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/procps/+bug/1055551/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs