>>>>> In <87tzxzsenz.fsf@baldur.tsdh.de> Tassilo Horn wrote:

> sometimes when I follow up and yank an article Gnus uses the wrong face
> (gnus-cite-1) for my own, non-cited text. I made a screenshot of this
> bug [1]. As you can see the whole paragraph starting with "Sorry" is
> displayed with gnus-cite-1, whereas all my other paragraphs are
> displayed with the default face.

Showing the local value of `font-lock-keywords' in the message
buffer and the value of `message-cite-prefix-regexp' would be
helpful.  In addition, have you changed the value of
`message-cite-prefix-regexp' or added/removed some faces to/from
`gnus-cite-face-list'?

Currently the behavior of `gnus-message-citation-mode' is decided
by those values as of time when Gnus is compiled.  So, customizing
those options will not affect the behavior, or it might cause a
trouble if anything.  Well, the following patch may possibly do
the trick.