svn used to work on my server, but it no longer seems to. It says
authentication error when trying to connect to it with anything.

I have checked the authentication file, which seems ok.

It works as a LaunchDemon on my server (OSX 10.4.latest server). Or
should I say doesn't.

Everything else works, I can get files, find out which are modified. I
can even add. I just cant update modified files.
Any ideas?