[Dovecot] Problems fetching mail

I'm attempting to replace UW-IMAP with Dovecot, as my UW-IMAP implementation seems to be not working very well.

Here's the problem I had with UW-IMAP:

In Horde/IMP, messages just wouldn't appear at all. If I opened up the user's IMAP box via an IMAP client, I'd get a Bogus sequence in UID fetch error.

So, now I've got Dovecot in place, and I'm getting the following error upon attempting to look at this same box:

Error in IMAP command UID: Invalid UID messageset.

Now, this user has 3 messages, each X-UID increments by one, starting at 1, so:

X-UID: 1 X-UID: 2 X-UID: 3

None of those seem out of the ordinary size wise.

I'm not sure what config information you'll need of me, as I'm new to dovecot, but any help would be appriciated.

Thanks, Curt L.