Subversion MERGE error on commit nailed

Recently I've had a problem with subversion commits returning a '200 OK' result, accompanied by a peculiar MERGE error (when I'm not doing a merge), but weirdly, the commit had actually made it into the repo. I'd googled for this a while ago with no success, but I had another try today and found this post. Thinking about it, I'd had this problem since updating to the very-very-long-awaited trac 0.11 release. So I tracked down the latest release of the trac-post-commit-hook script and installed that, and amazingly enough, it just works. Thank you UberGeek!