Not sure what happened but remember tha when you install svn you have to install MP then TVServer (not the other way around). When MP is installed, it removes the old TVPlugin, TVServer installation puts the new TVPlugin in MP's plugins directory. If you don't have TVPlugin.dll in MP's plugins directory, then just reinstall TVServer from the SVN you already have.Moreover, with the last svn (2383) I had this two other issues:
-"Television" has disappeared from the MP configuration menu (only Videos, DVD, Music and Pictures)
-I couldn't change the aspect ratio of the image.
By the way, is there an easy way to uninstall the svn, or to go back to the plain MP 1.1 beta? I was about to uninstall MP completely and install it again without svn, but I'm afraid to loose again configurations etc.