Gnus MIME parsing bug?

[Giorgos Keramidas]

I have a UNIX mailbox with several MIME messages with multiple alternative 
parts, which comes up with seven different messages when opened in Mutt:

   1 r + 2006-02-26 Petros V             (   67) about svn
   2 r + 2006-02-28 Petros V             (   90) `->
   3 r + 2006-03-02 Petros V             (   53)   `->
   4 r + 2006-03-04 Petros V             (   91)     `->
   5 r + 2006-03-06 Petros V             (   47)       `->
   6 r + 2006-04-28 Petros V             (   76)         `->
   7   + 2006-04-29 Petros V             (  328)           `->

Then I create an nndoc group and try to import messages from this
mailbox though, Gnus shows only 3 messages.  It looks like some of the
messages are 'eaten' by the part that splits the mailbox in separate
mail messages.  This only seems to happen with messages that have
multiple alternative parts (i.e. text/plain and text/html).

In GNU Emacs 22.0.50.1 (i386-unknown-freebsd7.0, GTK+ Version 2.8.17)
 of 2006-05-06 on gothmog.pc
configured using `configure '--prefix=/opt/emacs' '--with-xpm' \
 '--with-jpeg' '--with-tiff' '--with-gif' '--with-png' '--with-gtk' \
 '--with-x' 'CC=gcc' 'CFLAGS=-O2 -pipe''

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: el_GR.ISO8859-7
  value of $LC_CTYPE: el_GR.ISO8859-7
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: C
  locale-coding-system: greek-iso-8bit
  default-enable-multibyte-characters: t

Major mode: Summary

Minor modes in effect:
  encoded-kbd-mode: t
  auto-compression-mode: t
  file-name-shadow-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  column-number-mode: t
  line-number-mode: t

Recent input:
x g n b u s - DEL DEL DEL DEL u s - u n TAB p o l TAB 
DEL DEL p l DEL DEL l TAB RET G f / t m p / k o t RET 
g RET ESC O B ESC O B ESC O A ESC O A v C-g RET h n 
P n P P h ESC u ESC u ESC u q ESC O A L L l C-u RET 
ESC x h e l p RET SPC q ESC x r e p o r t - TAB RE
T

Recent messages:
Loading gnus-cite...done
No more articles [2 times]
Retrieving newsgroup: nndoc+/tmp/kot:kot...
Opening nndoc server on /tmp/kot...done
Fetching headers for nndoc+/tmp/kot:kot...done
Suppressing duplicates...done
Scoring...done
Generating summary...done
Auto-saving...
Loading emacsbug...done