Doh! The screen itself - the LCD hardware - had fallen down a bit, out of the hinges. Bug closed.
** Changed in: ubuntu Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/773149 Title: top panel drops slightly in left side (unity AND classic) -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs