Can't login

[Dexter Filmore]

Xubuntu 9.10, all was fine, from one day to the next can't login. Enter 
credentials, loads something, back to GDM. Me: "?"
Gnoem and KDE sessions work, so X is ok.
Where would I check?

Dex

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b++(+++) DI+++ D- G++ e* h>++ r* y?
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