What's wrong with this regexp?

[Frank Schmitt <usereplyto@Frank-Schmitt.net>]

Is it possible that regexp's in nnmail-split-methods are broken?
I've got the following in my .gnus:

(setq nnmail-split-methods
           '(("NT-Emacs" "^\(CC:\|To:\).*help-emacs-windows@gnu.org.*")
	     ("NT-Emacs" "^\(CC:\|To:\).*ntemacs-users@cs.washington.edu.*")
	     ("XEmacs-NT" "^\(To:\|CC:\).*xemacs-???nt@xemacs.org.*")
	     ("Hamster-src" "^\(CC:\|To:\).*hamster-sourcen@\(yahoogroups\.\(de\|com\)\|egroups\.com\).*")
	     ("Replies" "^\(CC:\|To:\).*usenet@Frank-Schmitt.net.*")
	     ("Uni" "^\(CC:\|To:\).*fschmitt@uni-koblenz.de.*")
             ("mail.general" "")))

But everything goes in mail.general. I have absolutely no idea why.
Some examples of mails which go to mail.general but should definitely go
to a different group:

To: hamster-sourcen@egroups.com
Message-ID: <9jemnj.3vuh011.1@server.heimweb.de>
From: "Andreas Heim" <liste@heimweb.de>
Date: Sun, 22 Jul 2001 14:07:47 +0200
Subject: Re: [Fix]Hamster Events hamwindows.hsm
Xref: FRANK-FMB8GC9RR mail.general:1437
Lines: 17

To: xemacs-nt@xemacs.org
Subject: ldap, win32
From: Fabrice Popineau <Fabrice.Popineau@supelec.fr>
Date: Fri, 07 Sep 2001 16:17:14 +0200
Message-ID: <vgiv2ihh.fsf@supelec.fr>
Lines: 25
Xref: FRANK-FMB8GC9RR XEmacs-NT:360

Message-Id: <200110261117.HAA04621@glass.lplizard.com>
From: Chris Green <chrisg@lplizard.com>
To: help-emacs-windows@gnu.org
Subject: [h-e-w] emacs 21 under win2k
Date: Fri, 26 Oct 2001 07:17:38 -0400
Lines: 5
Xref: FRANK-FMB8GC9RR NT-Emacs:743

(I've snipped irrelevant headers)

-- 
One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the Land of Mordor where the Shadows lie.
19. Dezember 2001