I just want to highlight something about duplicate questions. I think that duplicate questions such as this one should be closed, but not deleted. The reason is this: someone who doesn't know the answer probably wouldn't know that they're both the same question. When I say someone who doesn't know the answer, remember that I am not speaking about the asker, but someone else reading the question who also wants to know the answer.
That being said, I think that there can be two (or more) different ways to ask the same question. Closing it as a duplicate is a great solution to this because not only will there be a link to the original question for the reader, but the reader may also learn something new simply from learning that the two questions address the same issue. Therefore the fact that it was closed as a duplicate in and of itself can be learned from. Any thoughts or disagreements?