Ah, I wasn't aware of that five minute time limit--thanks for pointing that out.  I knew about the underlining thing but I'd always thought it was in effect regardless of how much time had passed since your post was submitted.  I probably should have known that, having been here for years, but...

I'm not exactly sure what the real point of this thread is, because the edit button isn't exactly a hidden function that most members have trouble finding, but whatever.  I tend to use it (and recommend others to do likewise) to avoid posting consecutively in a thread that I'm posting more than once in.  It's also important to mark such edits as "EDIT:" or something similar so that people don't get confused.