Sorry, i am on a business (as usual in the last weeks / months ) so i can't test it but could someone try to replace the tvserver dlls (all dll's in the MPTvClient package) with the ones from RC3? Chances are that this is all to get it working again. Please report your findings.
Replaced all four tv*.dll from the RC3 pack in MPtvclient. When using TVlibrary.dll it throws an error, so replaced with the one from MPtvclient1.3.1, it then still works but the channel doesn't stop when quitting VLC so no change.
As a foot note I used the DLL from RC3 my server is running the latest SVN....:sorry: