Found a strange case in this question.
bdonlan's answer was given on May 16 '09 at 2:08, while the question itself was asked a year later on Apr 19 '10 at 18:00.
How did it happen?
This behavior is the result of a merge operation.
bdonlan's answer originally appeared under this question (posted May 16 '09 at 2:05), which was then merged into the newer one.