Apache WebDAVs not accepted as server

[rsvejda]

TeamDrive under OS X persistently says that my WebDAV server is not working correctly an that I should move my spaces somewhere else.
The very same space (WebDAV server) is used with Teamdrive under Linux (Ubuntu) and Windows (XP and Vista) without problems!

What is different? Why is Teamdrive under OS X so picky?
The problem comes when accepting an invitation; I do not even try to create the server key myself (on OS X)

WebDAV: Apache 2.2 server under Debian; with and without SSL (CAcert certificate); works well.
OS X: Snow Leopard, was Upgraded from Tiger
TeamDrive: version 2.2.052 (surprise! most test were done with 2.1.170) on Linux & Windows still 2.1.170 / .171

Any help appreciated!
Radim

Plus:
A general missing information is where to put certificates that TeamDrive accepts them? System - aka Safari?

[Claudia Schuster]

Hi Radim,

we need your logfiles. Next time the error-message appears (at next startup), please zip the folder /Users/<Your User>/.td2/logs and send it to support@teamdrive.net with a link to this thread.

Best regards
Claudia Schuster