Strang recurring problem

[Harry Putnam <reader@newsguy.com>]

Running emacs-24 and nognus, both of recent vintage.

I've been having a strange recurring problem.  I cannot reproduce it
at will but over time it does reproduce itself.

I run in topic mode, and have done for a good while.  In addition to
piles of gmane groups and mail groups.  I also have an nnimap setup
with gmail.  Its put into the topic setup like this.

-------        ---------       ---=---       ---------      -------- 
  gnus
   [...]
   nntp
     gmane [lots of groups under this]
   nntp-foreign
     opera bleh
     opera bleh2
     [...]
   nnml [many here]
   nnimap
    level1
      bleh:Send Mail
      bleh:All Mail
      bleh:INBOX
      [...] two or three more
    level2
      bleh:one
      bleh:two
      bleh:etc
      [...] 7-8 more
   [nndrafts] 
   more-nnml
   [ etc ]

-------        ---------       ---=---       ---------      -------- 

Probably a little overdone but you get the idea.

Well, every so often following a gnus start up, the level2 of nnimap
groups will have dropped to the bottom and out one step so its right
under gnus but at the bottom.  And even on a few occasions it appears
in both places with the exact same groups under it.

Its been a while since it last happened but it just happened a little
while ago.  This time only one instance but again, out one level and
dropped to the bottom.

When I first noticed it, I assumed I'd neglected so save properly and
so .newsrc.eld held some wrong information.

But I got more careful about saving deliberately every so often with
`s' in group buffer.  And yet a week or so later here it is again.

In all, it must have happened something like 6-7 times now... and
probably 4 of those had the double instance I mentioned.

Any ideas folks?