gdm failure?

[John Dangler]

I did a synaptic upgrade today.  All of a sudden, I'm logged out of
gnome and taken back to the gdm login.  I look in preferences, thinking
that a session time out has somehow been set.  I'm looking in the
screensavers, and I notice its random.  I start looking at the
individual screensavers starting from the bottom of the installed
screensavers list.  I come to an entry (I don't which one it is), and I
am logged out again.

Now, since that entry was the last entry I selected, every time I go
into screensavers under system->preferences, I am immediately logged
out!

Every time i'm sitting idle in gnome long enough for the screensaver to
launch, I'm immediately logged out!!

Can someone here point me as to where this is stored so I can change it
and find the borked screensaver ???

Thanks.