So far all you have is inuendo. If it was pine tar, why did the umpires who inspected it say it was dirt? Perhaps a Karl Rove conspiracy before the elections? Umpires know the difference. Maybe this is the October Surprise.
I think it was pine tar. But seriously, it's not that major of a thing. It's one of those rules that are in the books that everyone usually ignores--except when they need excuses. It's like that pine tar rule with the bat--recall that guy who hit a homerun and then they called him out because the pine tar on his bat was wider than home plate? Dumb rule. See the article linked in my post 153.