I think Mark Waugh and Ponting have always been a little sore as losers. They don't act as graciously as we have seen Steve Waugh and Adam Gilchrist do. Plus, I think JustTool's points are right to a point: Under Gilchrist, Australia played more defensively than I have ever seen. Maybe, Ponting's inputs were there too, but seeing how the fields were set in the fourth test, I doubt it.
I think Harbhajan, Ponting, Mark Waugh, Sourav, Warne, Yuvraj are guys who cannot say the nice things. They all like to bash each other because they all have the same attitude, for good or for bad.