Trouble with certain nnfolder groups

[Nevin Kapur <nevin@jhu.edu>]

I use procmail to deliver my mail to files in a certain directory. My
setup is:

(setq gnus-secondary-select-methods '((nnfolder ""))
      nnfolder-directory "~/mail/"
      mail-sources
      '((directory :path "~/mail/spool" :suffix "" )))

Everything works except for the fact that whenever I start up 2 of the
nnfolder groups are always displayed in the following way in my
*Group* buffer:

        *    0: nnfolder:661
        *    0: nnfolder:303

(My group-line-format is "%S%p%P%5y%5T: %(%g%)%l\n".) If I enter the
group then things work like they should. I just don't get any
information about these 2 groups in the *Group* buffer. I've tried
nnfolder-generate-active-file but that doesn't help.

My active file looks like:

eCommerce 304 276 y
ding 1022 460 y
Saved 76 1 y
Misc 424 407 y
MTS 90 1 y
JHU 1 1 y
Inbox 106 7 y
303 4 2 y
mail.misc 19 1 y
661 3 2 y
Archive 319 181 y
CBL 28 27 y
Cc 52 42 y
DMANET 192 12 y
Sent 41 1 y

Any hints as to what might be amiss? I'm using pgnus 0.97 on XEmacs
20.4.

Thanks,

-Nevin