[Dovecot] Migrating Dovecot 0.99 to 1.0stable

Hi,

I'm planing to move a big mail server currently under Dovecot 0.99 to Dovecot 1.0 stable. One problem I had once when doing this was that all the UIDL had to change and that all users using pop3 and leaving their messages on the server had to re-download all of them, which is annoying. I'd like to know to the UIDL really have to change when migrating from 0.99 to 1.0stable or if this was a configuration problem on my side. Are there any tips for this to be as transparent as possible for the users ?

Thank you.

-- Nico L'idée que la science peut et doit être organisée selon des règles à la fois fixes et universelles est utopique et pernicieuse. -+- Paul Feyerabend -+-