A debugging feature introduced into the X.org server 1.11 can be used by someone with physical access to the system to bypass the screensaver. First reported by "Gu1" on their blog and on the oss-security mailing list. The key sequence Ctrl-Alt-KeypadMultiply will bypass any screensaver. A workaround has been posted, but one would expect an update from X.org before long.
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