MLB tv on diablo does not appear to work either. I was able to launch the audio however, though not in the browser window (it launched the media player).

I see little chance that we will see an update that will allow this to work. There may be an update, but every time that the tablets have received an updated version of Flash, it has been a few revisions behind. Many sites check for the most recent version of Flash even if they don't need the most recent functionality.