Article counts under nnimap

[David Z Maze]

I'm using nnimap with total-expiry on Gnus 5.10.6 on GNU Emacs 21.2.1
(which is different from what I'm posting this from).  Several of my
groups have wrong article counts, apparently because Gnus believes
it's read articles that no longer exist.  For example, one of my
groups believes that it has 1939 articles in it, and if I run 'G E' on
the group the property list includes that Gnus has seen a sparse set
of articles (seen (6081 . 6100) (6102 . 6107) ... 8019 (8021 . 8022)).
But if I log into the IMAP server directly, a UID SEARCH ALL command
lists articles 7728 through 8022, including things like 8020 that
aren't in that seen list.  (It looks like 8019 and 8020 are
duplicates, and I have both gnus-summary-ignore-duplicates and
gnus-suppress-duplicates set to t.)

This all feels a little weird to me.  If nothing else, I'd like to
have the user-visible article count correct, but it also feels like
Gnus has a somewhat wrong feeling of what's going on on the IMAP
server?  Any hints?

Thanks,

  --dzm