Yes, helping to test and reporting bugs is very appreciated, David. Please continue to do so.
If you are working in a subversion working copy then the SVN revision should indeed be properly detected by the game, if it does not then it's probably a bug.
My point was just that this issue, if it exists, is most likely limited to development builds but will not occur on releases.
You can use the svn info command to determine which revision the subversion working copy is on. The svn update command will also display it when it has completed updating.