The screensaver seems to have issues.
Once I press OK, I get this:Code:The GNOME screensaver daemon appears to be running. It must be stopped for XScreenSaver to work properly. Stop the GNOME screen saver daemon now?
However this doesn't seem to solve it.Code:The XScreenSaver daemon doesn't seem to be running on display ":0". Launch it now?
I have found this thread here from 2006:
Not sure if its still the case after 6 years.