Have you ever edited your response after someone replied to it?

No, and here is an example! http://www.fluther.com/flagquip/?id=106169

:p

No..

I usually denote my edits with edit :: explanation

I will fix spelling and grammar without noting it. But I will always give an explanation if the content is changed enough to have a different meaning.

I’ve never done it, but I have seen others change their posts.

not consciously.

I have a habit of editing and editing to refine my statement. I’m not a very good writer, and I find that I tend to speak in incomplete thoughts.

I would never, however, do it with the intent to make someone look like an idiot.

no

i haven’t. i don’t usually get the chance ;-)
that makes me wonder: what’s the expiration date on the “edit” button. I know that at first it’s there, and then it goes away…what’s the deal?

Never done it intentionally. I try to apply same approach as johnpowell, although sometimes it ends up just being an extra paragraph or an inserted sentence.

@la_chica.: I think the time-limit is 5 minutes.

The time limit is five minutes. But you can click the edit button at four minutes and 59 seconds and edit as long as you need to.

Nope. And when I edit my replies, I make a note of it so people know it was edited.

When the error is typo, sometimes.