MailDir stopped working

[Robert Schmid]

For some reason I can no longer get my mail (pop or IMAP) using 
~user/Mailbox.  In order to access my mail again I had to add a symbolic 
link to users mailbox in /var/mail.

I thought this was a result of a bug in Eudora - but since it's happening 
to other users too, I have to look at the server.