nnimap summary errors

[Jesse F. Hughes]

Hey ho.

I sent an email to someone and filed a copy in my mailgroup
INBOX.newsgroup.chats.  When he replied, I filed his copy there too,
but something confusing happened.

When I peeked into the group, I saw in the summary buffer a message
with his from address and subject (same as mine, with "Re:"
prepended).  I opened it to read it and saw *my* message.

I can't find an entry for my message in the summary.

There is a file in the Maildir for his message, so the problem seems
to be Gnus's, not the IMAP server.  What gives and how can I fix it?

Thanks.
-- 
Jesse F. Hughes
"Wiles made somewhere around half a million dollars U.S. that I heard
about, and I know he didn't take major endorsements."  
  --JSH on the rewards of proving Fermat's last theorem.