svn via DAV not handling filenames containing percent sign '%'

SVN does seem to have some trouble with the percent sign in filenames
when going through DAV (application version details below):

vstte_at_iota [16:48:02]> touch %ff%
vstte_at_iota [16:48:05]> svn add %ff%
A %ff%
vstte_at_iota [16:48:09]> svn commit -m "test" %ff%
Adding %ff%
svn: Commit failed (details follow):
svn: PROPFIND request failed on '/rCOS/vstte/%25ff%25'
svn: PROPFIND of '/rCOS/vstte/%25ff%25': 400 Bad Request (http://XXXX)

Switch from DAV to 'svnserve' solved the problem. I'm not sure if this
is a problem with mod_dav or mod_dav_svn. Checking out those files via
DAV doesn't seem to be a problem, I don't have tested updating them yet.

subversion server-side is Debian on AMD64 with Apache:

subversion 1.4.6dfsg1-2
apache2 2.2.8-1
libapache2-svn 1.4.6dfsg1-2

Client is svn 1.4.6 on MacOS X.

Should I file a bug report?

Volker

-- 
United Nations University -                                       http://rcos.iist.unu.edu/~vs/
International Institute for Software Technology                    
Macau SAR, China