I'm very sorry for the inconvenience. I still haven't come around to updating SubVersion and especially the Apache SubVersion module (which is what causes problems).Originally posted by Martin Gühmann
And now a failure for me.
As a work around I've now enabled a cron job that restarts Apache once a day. Let's see if it works more reliable now. But it's a hack, not a solution, so I need to update soon. I'll try to do it this week.