Yea, this thing's been going on for a while. That MPA zealotry is a real pain in the *** if you ask me. I can understand musicians protecting their copyrighted material so no one goes off with it and makes big cash or a campaign against illegal downloads, but they are WAY overdoing it here. Sounds more like the music biz trying to squeeze some more dollars out of "official" tablature. And I don't think the musicians themselves will see much of that money. Here's another
thread that contains some discussion on the topic. Read it if you haven't already...