binary file is changed if svn:keywords Id is set

Hello all,

Im a happy and content svn-user since a few years; thanks to all the effort
creating such a useful tool; especially the webdav/ssl feature is most
useful behind a firewall o;) I'm mailing the first time, and I want to
focus your attention to a behaviour of svn I consider a bug (or at least a
feature I cant think of an useful application). If you set the svn:keywords
= Id property to this file and check it in, svn changes it as you can see
from the md5sum although its explicitely declared to be mime-type =
non_text/XX

Versions of svn/apache:
svn help:
Subversion command-line client, version 1.3.2.
apache error.log:
[Wed Aug 29 23:23:36 2007] [notice] Apache/2.0.55 (Ubuntu) DAV/2 SVN/1.3.2
mod_ssl/2.0.55 OpenSSL/0.9.8b configured -- resuming normal operations

I looked up the svn issue tracker for keywords: 'keyword' and 'binary' and
didnt find any similar issues.
I want to apologise the length of the attached file but I tried to 'gcut' it
down but then the bug disappears.

Thanks in advance, in the hope to make a good tool a very little bit better
Reimund

muehe@saturn ~/quill/package>md5sum libQuill.cxt
0b6fe7eff6100948439894f051324f2a libQuill.cxt

muehe@saturn ~/quill/package>svn propset svn:keywords Id libQuill.cxt
property 'svn:keywords' set on 'libQuill.cxt'

muehe@saturn ~/quill/package>svn ci . -m test_binary_keywords
Sending package/libQuill.cxt
Transmitting file data .
Committed revision 266.

muehe@saturn ~/quill/package>!md5
md5sum libQuill.cxt
f825737e720e889a1470058abd4ff98b libQuill.cxt

muehe@saturn ~/quill/package>svn -v proplist libQuill.cxt
Properties on 'libQuill.cxt':
  svn:mime-type : data/context
  svn:keywords : Id

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