can't add any new users

[Charlie McElfresh]

Hi,

I recently upgraded all my machines to 6.2 RELEASE.  All my machines except
one work fine.

On one of my machines, I can log in from the console to the super user
account, but I could not su to my user account.

So, I backed up all my data, and I deleted my user account.  Then, I added
it back with adduser.

When I look in /etc/passwd and /etc/group, I'm in there.

When I try to su to my newly created account, I get this message:

Bad system call (core dumped)

I tried removing my account with rmuser, then adding it back again -- same
problem.

Any ideas?

Charlie