As mentioned further on in the topic: It was fixed and commited in SVN before RC2. See this issue: 0002807: A/V detection for recordings is not working correctly - MediaPortal Bugtracker.Let me clarify and THANKS for all your help! The test.dll patch was a TVLibrary.dll (in the form of a .zip attachment) that was made available after RC1 was published. Folks evaluated test versions of TVLibrary.dll from this and the other thread and found the changes got ATSC tuners working... then on 4/14/10 RC2 was published. Since no one generated a bugfix the 'testing' done by folks on both of these threads has no way to get incorporated into the next RC, namely RC3.
I can see why it's difficult to pull these patches together - we post the issues on many different sub-groups and sometimes arrive at the same conclusion. I'm tring to speak out for ATSC users and asking for a bugfix so this can be fixed without having to use the ResetGraph Debug option.
Well the rest of my previous post stands, if you still have a problem: Post all logs and test with clean RC2.
If it is the same issue i will move this thread to the RC forum to prevent this from getting lost, if it is not the same problem we have to start a new thread in the RC forum.