Quotas and deleted users

[Ryan Golhar]

I recently deleted a user from our system (including his home directory)
and used 'repquota' to report all user's quota stats.  

His entry is still listed there, but instead of his username being
displayed, its his old user ID.  Why is he still listed even though his
home directory has been removed?  The only place quotas are enabled is
on /home which is NFS exported.