[Dovecot] randomly disconnected with imap, and latest hg

Hi!

I'm using latest hg from the 1.1 branch, and noticed that since yesterday's updates, dovecot randomly disconnects clients when using imap, with these message in the log:

"Disconnected for inactivity in reading our output bytes=153/41319"

This happens randomly. Eg. I'm fetching messages, and suddenly, dovecot disconnects. Or my MUA just sits there, and then again, dovecot disconnects me with this message. I didn't even do anything with the client, so I can't think of anything which could've been read.

What could be the problem?

Daniel