CentOS - Nov 2007 - Web DAV (folder) access fails

I'm trying to get web folder (DAV) access working to my CentOS 5 setup. I 
previously had it working fine under Fedora 2. I can access the folder with 
the Java-based DAVExplorer, but Windows Network Places won't let me
"Add a
Network Place", telling me that "The folder you entered does not
appear to
be valid". I'm using https with self-signed cert and htpasswd file. If
I
switch to non-SSL, Windows recognizes the URL as valid, but my logins all 
fail with a 401.

I don't see any clues in the Apache logs, and I'm not sure where to look
next.

I've since discovered these two informative articles telling about problems 
with Windows WebDAV implementations:

<http://en.wikipedia.org/wiki/WebDAV#Microsoft_Windows_clients>

<http://svnbook.red-bean.com/en/1.2/svn.webdav.clients.html>

I haven't gotten it to work yet but these sound like promising leads.