Yup.
HTML tags only really stick after an edit. Hate that. Would rather stick bits of code in on the fly. And my speling sucks, so I'll change that.
But a wholesale rewrite is a different matter. It makes all the responses sound, well, stupid. In a way, editing a post this way also re-writes all of the responses to the post. For example, my own response to Tech's original post now seems like I'm responding to a different post entirely.
Which I was.
I don't mind editing a post to make it a better presentation with images, format, what have you. Changing every single word? Un-cool.