In my own mind I think that Tiger may well have benefited from some previous calls by dubious rulings; however, so did a few other Major winners.
I think there does have to be a line drawn between a dubious ruling, and a dubious action which has to be corrected by an official.
Someone mentioned the two Els incidents. I'm assuming the "grandstand drop" was actually the moveable/immovable obstruction controversy at the 1994 US Open? Trey Holland made a ruling that he fully admits was wrong. In Els' Masters incident, the rules official made a ruling that Els thought was wrong, so he escalated it to the chairman of the rules committee. The rulings may have been dubious, but they were made by a tournament official. While I'm not a fan of professional golfers calling in a rules official for every single potential infraction, Els took the responsibility off of his hands.
Woods didn't take that route in any of his rules controversies this year, so whether the rules were followed properly is his responsibility. For three of the four instances he had to be called into the tent afterwards to get penalties, and for the fourth he possibly should have. While the breaches were addressed, Woods definitely looked bad.
Again though, as of right now Chamblee is the one who looks even worse due to his excessively vituperative, personal attack.