This happens often to me: I ask a question, then get an answer to that question (strictly as the question is asked). Now, based on those answers, there is a slight modification of the question I would like to ask. However, that particular question already has gotten votes, answers, and the correct answer has been check marked. In such circumstances, is it appropriate to: (i) edit the question to the modified question [I'd think not], or (ii) ask the modified question as a new question, linking to the old one.

(ii) seems like the right thing to do but I don't know about the issue of whether it's fair to ask many similar questions -- since voting is done on individual questions, this might seem like an attempt to garner more votes (or try to attract more people's attention) by posting similar questions all over the place.

@vipul: I would *strongly* recommend that you think before you post. If you ask a question and you get an answer that's correct but doesn't answer the question you really have, then you probably asked the wrong question. Rather than ask what to do next, why not try really hard not to put yourself in that position at all? Think of what question you want to ask, and then sit on it for a bit, and then come back to it, and decide if that's really what you want to know. If you're convinced that it is, then ask. Mathematicians are an unforgiving lot: someone asked recently if there was an "algorithm" to solve a particular problem recently and I made a logically correct, but hopelessly useless, comment, giving a genuine algorithm of the form "keep trying until it works". My point was not that this was a logically correct answer but that the questioner was almost certainly asking the wrong question, in this instance.