[Dovecot] assertion problems w/ 1.0alpha4

[Jeremy Brown]

Hey list,

I have been using 0.99.14 for a while now but recently decided to try to 
upgrade to 1.0alpha4 to get the latest and greatest.  I'm building from 
source myself on a Slackware 10.0 machine.  Slackware ships with UW-IMAP 
configured to keep your inbox in /var/spool/mail and your other folders 
in ~/.  I've been using the same setup for dovecot so that the migration 
is smooth...so my default_mail_env is set to:

default_mail_env = mbox:~/:INBOX=/var/mail/%u

I'm able to connect to both pop and imap servers and authenticate 
myself, but as soon as I attempt to get a listing of my emails my 
dovecot setting crashes with the following in the mail logs:

Nov  3 10:52:40 shallowhal dovecot: imap(jeremy): file 
mail-index-sync-ext.c: line 155 (get_ext_header): assertion failed: 
(memcmp((char *)(ext_hdr + 1), ext->name, strlen(ext->name)) == 0)

I can trigger this over POP3 just by logging in, then issuing "USER 
username", "PASS password", and then "LIST".

Anyone experienced anything like this before?  Any ideas on what might 
be going on?  I can include more debug information (like my dovecot.conf 
file) if it would help.

Jeremy