This question already has an answer here:
First answer was posted, but was wrong.
I posted my answer, which was correct :-)
First answer was then modified to match my answer (with attribution)
Meanwhile, the first answer got a total of four up-votes, some from when it was still wrong. My answer has one. There is no accepted answer yet.
I guess this falls into the "grin-and-bear-it-and-move-on" category? What are the ethics of essentially posting a different answer which is still timestamped with the time of an earlier, incorrect answer? Is this flaggable?