altered mbox files not recognized

Hi,

I'm having the strange problem that subversion does not want to commit a
new revision when I remove a mail from an mbox file in mutt. Observe:

08:11 viktor@bart:~/Mail $ rm Inbox
08:11 viktor@bart:~/Mail $ svn up Inbox
# <remove a mail in Inbox>
08:11 viktor@bart:~/Mail $ svn diff Inbox
08:12 viktor@bart:~/Mail $ diff Inbox .svn/text-base/Inbox.svn-base | head
1933a1934,2004
> From www-data@pdx.freedesktop.org Wed Mar 17 23:35:07 2004
> Received: from sigma.informatik.hu-berlin.de [141.20.20.51]
> by localhost with POP3 (fetchmail-6.2.5)
> for viktor@localhost (single-drop);
> Wed, 17 Mar 2004 23:35:07 +0100 (CET)
> Received: from mail.informatik.hu-berlin.de (mail [141.20.20.50])
> by sigma.informatik.hu-berlin.de
> (8.12.10/8.12.9/INF-2.0-MA-SOLARIS-2.8) with ESMTP id i2HMV8AO014615
> (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK)
08:12 viktor@bart:~/Mail $ ls -l Inbox .svn/text-base/Inbox.svn-base
-r--r--r-- 1 viktor viktor 74285 2004-03-18 08:02 .svn/text-base/Inbox.svn-base
-rw-r--r-- 1 viktor viktor 71606 2004-03-18 08:11 Inbox

subversion only notices changes to the file when I add content to it in
mutt. However, when I touch the file subversion does notice it.

So the problem is how mutt handles the mbox file when it deletes the
mail, but what exactly is the problem?

Links are appreciated.

Ciao,
Viktor

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