Just a quick post. Xorg is the graphical server that handles the desktop environment you choose for your Linux box. A pretty big flaw was found in Xorg versions 1.11 and later that allows anyone to bypass the screen lock mechanism on xscreensaver, gscreensaver, and many others.
The key combo that allows us to bypass the password protected is: ctrl + alt + *.
It's unknown whether or not this was left there intentionally, but the issue remains unresolved.