Possible Duplicate:
What's the SO policy about having multiple user accounts?
EDIT: hmm...So what's the right answer? You can have multiple accounts if you don't up vote yourself?
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Sign up to join this communityPossible Duplicate:
What's the SO policy about having multiple user accounts?
EDIT: hmm...So what's the right answer? You can have multiple accounts if you don't up vote yourself?
As far as I know you can have as many accounts as you want for any reason (asking embarrassing questions, wanting to post answers/questions anonymously, wanting a fresh start, etc) as long as you don't upvote yourself.
Both are unregistered accounts, so may be he just lost his browser cookies or used different browser / computer and ended up creating new account.
I can think of one case where one user has multiple accounts (three I think), but it cause(s|d) no problems.
Oscar Reyes used to have 3 accounts, but now they have been merged into one. He had over 10k rep on at least 2 of them.