When using the latest 0.12 version of the trac-post-commit-hook I got a strange MERGE message back on checkin to subversion. My local copy of the checked in file did not advance the version number, but the subversion repository got the new file-version. The ticket was not updated either.
An older version (I saved previously for 0.11) of the hook script works ok so I assume that it is only the trac-...-hook script that is malfunctioning. I could not find any helpful things in the logs for apache,trac or the hook script itself.
I'm using Eclipse 3.5.2 with Subclipse (which put up the dialogbox with the MERGE message) Subversion on server is version 1.6.12. Trac is 0.12.