gnus forgets new mail

[Norman Walsh <ndw@nwalsh.com>]

I had the following frightening experience today. I've duplicated it
using gnus built from CVS as of this morning.

New mail arrives and gets filtered into folders:

...
  [ Stuff to Read -- 233 ]
       3, 369: nnml:misc                               
*      0,  16: nnml:misc.webguy                        
      39,  81: nnml:misc.spam                          
...

If I quit gnus, close emacs, etc. and come back later, when I start
gnus again, all the new messages in 'misc' disappear.

...
  [ Stuff to Read -- 230 ]
*      0, 369: nnml:misc                               
*      0,  16: nnml:misc.webguy                        
      39,  81: nnml:misc.spam                          
...

AFAICS, this only happens in the misc folder. If I enter the folder
with C-u space, I can see the messages, which look like they've
already been read, sitting in the folder.

Now, I don't quit gnus very often so I doubt I've missed (much) mail,
but that also means I don't know how long this has been going on.

Help!?

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | Some people will never learn anything,
http://nwalsh.com/            | for this reason, because they
                              | understand everything too soon.--Pope