[K12OSN] unable to login from terminals after upgrade from fc6-->fc7

[Nadav Kavalerchik]

i've upgraded a test server from fc6 with ltsp 4.2 using "apt-get
dist-upgrade" which went quite smoothly :-)
(it took 2 days downloading ! and 1/2 an hour install)
next thing i had to update the kdmrc file with my old settings. (i checked
it a few times with diff)
of course some other configuration files were changed but i reviewed them
and the changes were not immportant enough to consider a problem as far as
running the server as ltsp machine.

BUT...
i can not login at the terminals :-(

the terminal loads, kdm loads, i see it try to auto-login (this is how it
was set before)
and... X reset and back to the login screen.
no log file entries, no session errors file, nothing...

any ideas ?
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