I started receiving messages about my version of subversion being out of date. Jettro Coenradie wrote an article on how to upgrade the subversion client on your Mac.

It boils down to this:

1. Download and run the latest Collabnet installer for subversion on the Mac.
2. Ensure that your path includes /opt/subversion/bin before the old subversion path /usr/local/bin. For example, I have in my .bashrc file:
   

   
   # Check for Collabnet Subversion
   if [ -d /opt/subversion/bin ]; then
   export PATH=/opt/subversion/bin:$PATH
   fi
   

3. If you have programs like SCPlugin that interact with Finder, log out and log back in so that all of your processes have the new path.