If I start X (with gnome) using default 'startx' just, the xscreensaver can't be invoked - xauth tells that authentification failed for 'nobody'. This causes GNOME's gpanel 'Lock screen' menu entry not functioning (seems screensaver won't be invoked after specified delay, etc). Thanks.
I can't tell whether this is a gnome bug or an xscreensaver feechur. It's easily duplicable.
We won't fix this. The alternative is to have xscreensaver stay running as root when called by root, which opens up *gaping* security holes if it's run from xdm, or other similar methods.
*** Bug 120717 has been marked as a duplicate of this bug. ***