On a first glance it sounds like a similar issue to http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=640765 in Debian.
** Bug watch added: Debian Bug tracker #640765 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=640765 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1011820 Title: terminal displays garbage when using sudo su - To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/screen/+bug/1011820/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
