User unable to startx

[nobut1 <nobut1@cwis.net>]

Hello.  I recently have run upon a very annoying problem.  For reasons 
unknown, I can no longer start X from a standard user account.  Root 
can startx fine.  A user can change to su and startx X fine.  But 
whenever a standard user attempts to startx, they get a long list of 
errors culminating with /dev/null (Permission Denied).

I am curious to exactly what could cause such an error and exactly how 
one would go about fixing such a problem.

Thank you.