If you're not calling him a liar, I'm not sure why you quoted that paragraph of text.

Maybe you don't have to post anything, but the mertailor's post is very specific and looks convincing. Besides saying that he changed the form, you haven't done much to defend yourself. I think people would feel much better about your side of the story if you provided details. Sure you don't have to, but this is your reputation, and if you care about that, then you'll set the record straight.