I've only tested it with Chrome on XP (though I could try it on something else), but usually when you edit a comment, the display updates with the new text and today for some reason, it doesn't update and you have to refresh.

As some of you may have noticed, I'm pretty anal about editing my comments (and then hours later, I'll still kick myself because in all of the edits, I'll sometime skip a word, leave an extra one in place or realize that I had ended-up with a bunch of gobbly-goop) The mandatory refresh makes it even harder to make sure certain that my comments are almost right.