[Dovecot] Imap crashes when trying to move messages

[ambroz.bizjak at guest.arnes.si]

> The imap process crashes when SquirrelMail wants to move a message to

> another folder. I have run imap in gdb and talked to it the same way

> SquirrelMail does and got a backtrace.

> 

> I am using Dovecot beta3. I am using it in combination with XMail,

> which has maildir databases.

> My system is Gentoo Linux on x86.

> The same version of Dovecot works great for me on amd64 with exactly

> the same config.

> 

I got more info. The mailboxes I was using were directly copied from
another server which was also using Dovecot. After I deleted all files
named *dovecot* in the maildirs, the imap process no nolger crashes.