xdm does not start anymore - Impossible parser error

[Jan Ulrich Hasecke <juh@pironet.de>]

Hi Debians! 

I have a strange problem since yesterday. xdm does not start anymore. 

When I boot the system, xdm dies with this errormessage:

Checking for valid XFree86 server configuration.../usr/sbin/parse-xf86config:D:35: Impossible parser error.
Please contact the maintainer of this program.
Stopped at /usr/sbin/parse-xf86config line 1565, <INPUT> chunk 35.
error in configuration file.
Not starting X display manager.

I can start X with startx without problems. I could swear that I did
not change anything on my system. --- Ok, there was an uptime of 14
days before. ;-)

I am using slink/potato and

xdm            3.3.3.1-3.1    X display manager

Does anybody know what the errormessage means? 

Ciao!
juh

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