Localhost IMAP (Dovecot) Not Being Delivered After Exim4 Upgrade

[David Baron <d_baron@012.net.il>]

I enabled dovecot's pop3 and could get the messages that way, just fine.
Messages just sat in the mail /var/mail/$USER directory running the IMAP. Had 
been working just fine yesterday.

Any ideas? Need to add something to exim4 config? Bug?
Should it have affected the IMAP at all??