nnimap-request-list operates differently right after startup

[Lloyd Zusman <ljz@asfast.com>]

I've been seeing a problem in recent Oort versions (maybe over the past
4-6 weeks), where nnimap-request-list sees newly arrived messages if
it's invoked immediately after startup, but where it then refuses to see
any more new messages if it's re-invoked subsequent times.  This begins
to occur after the messages which were originally present at startup
have been read, and then nnimap-request-list is re-invoked after new
messages have arrived in my INBOX; i.e., these new messages are not
seen.

Below are two nnimap-debug logs which illustrate the problem.  Notice
that in the log that's generated right when Gnus is starting up, the
result of the nnimap-find-minmax-uid call is the appropriate minmax
list.  However, note that in the second invocation, after that first
message had been read, the result of nnimap-find-minmax-uid is now nil,
even though there are indeed new messages in my INBOX at the time of the
second invocation.

If I then exit XEmacs and Gnus, and then restart, I will then see the
INBOX messages that were previously missed (i.e., the
nnimap-find-minmax-uid call will then return the proper minmax
information).

I'm running XEmacs 21.4.6 under RedHat Linux 7.2, and my INBOX is on a
remote host that's running a very recent version of Courier.

Any ideas?

Thanks in advance.


nnimap-debug log right when Gnus is starting up
-----------------------------------------------

 ======================================================================
 1 -> nnimap-server-opened: server="myimap"
 1 <- nnimap-server-opened: nil
 ======================================================================
 1 -> nnimap-open-server: server="myimap" defs=((nnimap-address "imap.myserver.com") (imap-log t) (nnimap-nov-is-evil t))
 | 2 -> nnimap-server-opened: server="myimap"
 | 2 <- nnimap-server-opened: nil
 | 2 -> nnimap-open-connection: server="myimap"
 | | 3 -> nnimap-possibly-change-server: server="myimap"
 | | 3 <- nnimap-possibly-change-server: " *nnimap* myimap"
 | 2 <- nnimap-open-connection: (("myimap" " *nnimap* myimap"))
 1 <- nnimap-open-server: (("myimap" " *nnimap* myimap"))
 ======================================================================
 1 -> nnimap-request-scan: group=nil server="myimap"
 | 2 -> nnimap-split-articles: group=nil server="myimap"
 | | 3 -> nnimap-possibly-change-server: server="myimap"
 | | 3 <- nnimap-possibly-change-server: " *nnimap* myimap"
 | | 3 -> nnimap-split-find-inbox: server="myimap"
 | | 3 <- nnimap-split-find-inbox: nil
 | 2 <- nnimap-split-articles: t
 1 <- nnimap-request-scan: t
 ======================================================================
 1 -> nnimap-request-list: server="myimap"
 | 2 -> nnimap-possibly-change-server: server="myimap"
 | 2 <- nnimap-possibly-change-server: " *nnimap* myimap"
 | 2 -> nnimap-before-find-minmax-bugworkaround: 
 | 2 <- nnimap-before-find-minmax-bugworkaround: nil
 | 2 -> nnimap-pattern-to-list-arguments: pattern=("INBOX")
 | 2 <- nnimap-pattern-to-list-arguments: ((nil . "INBOX"))
 | 2 -> nnimap-find-minmax-uid: group="INBOX" examine=examine
 | 2 <- nnimap-find-minmax-uid: (1 314860 314860)
 1 <- nnimap-request-list: t
 ======================================================================
 1 -> nnimap-server-opened: server="myimap"
 1 <- nnimap-server-opened: (open run)
 ======================================================================
 1 -> nnimap-request-newgroups: date="Wed, 27 Feb 2002 20:54:51 -0500" server="myimap"
 | 2 -> nnimap-possibly-change-server: server="myimap"
 | 2 <- nnimap-possibly-change-server: " *nnimap* myimap"
 | 2 -> nnimap-before-find-minmax-bugworkaround: 
 | 2 <- nnimap-before-find-minmax-bugworkaround: nil
 | 2 -> nnimap-pattern-to-list-arguments: pattern=("INBOX")
 | 2 <- nnimap-pattern-to-list-arguments: ((nil . "INBOX"))
 1 <- nnimap-request-newgroups: t


nnimap-log after all original messages were read and new ones have arrived
--------------------------------------------------------------------------

 ======================================================================
 1 -> nnimap-server-opened: server="myimap"
 1 <- nnimap-server-opened: (open run)
 ======================================================================
 1 -> nnimap-request-scan: group=nil server="myimap"
 | 2 -> nnimap-split-articles: group=nil server="myimap"
 | | 3 -> nnimap-possibly-change-server: server="myimap"
 | | 3 <- nnimap-possibly-change-server: " *nnimap* myimap"
 | | 3 -> nnimap-split-find-inbox: server="myimap"
 | | 3 <- nnimap-split-find-inbox: nil
 | 2 <- nnimap-split-articles: t
 1 <- nnimap-request-scan: t
 ======================================================================
 1 -> nnimap-request-list: server="myimap"
 | 2 -> nnimap-possibly-change-server: server="myimap"
 | 2 <- nnimap-possibly-change-server: " *nnimap* myimap"
 | 2 -> nnimap-before-find-minmax-bugworkaround: 
 | 2 <- nnimap-before-find-minmax-bugworkaround: nil
 | 2 -> nnimap-pattern-to-list-arguments: pattern=("INBOX")
 | 2 <- nnimap-pattern-to-list-arguments: ((nil . "INBOX"))
 | 2 -> nnimap-find-minmax-uid: group="INBOX" examine=examine
 | 2 <- nnimap-find-minmax-uid: (0 nil nil)
 1 <- nnimap-request-list: t



-- 
 Lloyd Zusman
 ljz@asfast.com