On Tue, Sep 28 2010, Steinar Bang wrote:

Same here, with a mail on this list
  nnimap-insert-partial-structure((("text" "plain" ("charset" "us-ascii") NIL NIL "7bit" 138 5 NIL "1" NIL NIL) ("text" "x-patch" ("charset" "us-ascii") NIL NIL "7bit" 507 11 NIL "2" NIL NIL) "mixed" ("boundary" "=-=-=") NIL NIL NIL) (("2" "--- GNUS-NEWS	2010-04-22 01:29:56.000000000 +0800
\n+++ GNUS-NEWS.new	2010-09-28 12:48:25.000000000 +0800
\n@@ -50,7 +50,7 @@
\n The primary change this brings is support for DIGEST-MD5 and NTLM, when
\n the server supports it.
\n 
\n-** Gnus includes a password cache mechanism in password.el.
\n+** Gnus includes a password cache mechanism in password-cache.el.
\n 
\n It is enabled by default (see `password-cache'), with a short timeout of
\n 16 seconds (see `password-cache-expiry').  If PGG is used as the PGP
\n") ("1" "In GNUS-NEWS, it mentions password.el, but in source its name was
\nchanged to password-cache.el.
\n
\nAttached is diff file to fix this.
\n
\n")))
  nnimap-convert-partial-article((("text" "plain" ("charset" "us-ascii") NIL NIL "7bit" 138 5 NIL "1" NIL NIL) ("text" "x-patch" ("charset" "us-ascii") NIL NIL "7bit" 507 11 NIL "2" NIL NIL) "mixed" ("boundary" "=-=-=") NIL NIL NIL))
  nnimap-get-partial-article(2371 ("1" "2") (("text" "plain" ("charset" "us-ascii") NIL NIL "7bit" 138 5 NIL "1" NIL NIL) ("text" "x-patch" ("charset" "us-ascii") NIL NIL "7bit" 507 11 NIL "2" NIL NIL) "mixed" ("boundary" "=-=-=") NIL NIL NIL))
  nnimap-request-article(2371 "lists.ding" "Naquadah" #<buffer *Article nnimap+Naquadah:lists.ding*>)
  gnus-request-article(2371 "nnimap+Naquadah:lists.ding" #<buffer *Article nnimap+Naquadah:lists.ding*>)
  gnus-request-article-this-buffer(2371 "nnimap+Naquadah:lists.ding")
  gnus-article-prepare(2371 nil)
  gnus-summary-display-article(2371 nil)
  gnus-summary-select-article(nil nil pseudo)
  gnus-summary-scroll-up(1)
  call-interactively(gnus-summary-scroll-up nil nil)

(maybe several backtraces will help :-))

With "text/" set.

-- 
Julien Danjou
// ᐰ <julien@danjou.info>   http://julien.danjou.info