[Dovecot] 1.1 -> 1.2 upgrade?

Hey folks. I'm currently running Dovecot v1.1.6, and would like
to move to 1.2.x soon. I'm using MySQL-backed LDA and fully
virtualized mailboxes. Are there any upgrade gotchas I should be
aware of? How much config file hacking should I expect?

         Thanks,
         -Dave

-- Dave McGuire Port Charlotte, FL