Although he still strongly disagrees and calls him a 'Shogeg' (inadvertent transgressor) and misguided, R' Feldman realizes that Rabbi Lipman is indeed L'Shem Shomayim. He also said that he never called him Amalek or Haman. That's true. But he did say that he was a Shana U'Pireish. I guess he didn't remember that he said that.
In any event I give credit to the Rosh HaYeshiva for his honesty, ability to admit making a mistake in judgement and apologizing for it immediately. There is nothing wrong with disagreement. Even strong disagreement. An audio recording of his apology is available at Matzav.