Comment 4 for bug 191503

Ted that bug, bug 145123, was worked around in GNOME Screensaver, here's the change log entry:

gnome-screensaver (2.20.0-0ubuntu4.2) gutsy-security; urgency=low

  * SECURITY UPDATE: screen lock bypass via shortcuts when compiz running.
  * Add debian/patches/05_locking_for_compiz.patch: patch for lock dialog for
    when Compiz is enabled from Michael Vogt (LP: #145123).

And then fixed in compiz for Hardy:

compiz (1:0.6.2+git20071018-0ubuntu2) hardy; urgency=low

  * debian/patches/030_fix_screensaver:
    - never unredirect the gnome-screensaver window to prevent
      breaking the keyboard grab (#145123)