I was looking at my previous questions and noticed that I have a question https://askubuntu.com/questions/94676/is-there-a-simple-gui-based-program-available-to-join-combine-mp3-files that has (rightly) be closed, but I could mark the answer there as the accepted answer if I wish.

Is this just a quirk of the system or is there a reason why it is still possible to mark answers as accepted when the question ha been closed