I thought this had been addressed before but if it has I can't find it.
There was a question asked a day or two ago which has what at first site appears to have a good answer. The OP accepted that answer. Unfortunately, the answer was technically incorrect, as the answerer himself has since acknowledged.
Is there a mechanism by which the acceptance can be withdrawn? Can moderators do this if so asked?
I'm not providing a link because I believe it's quite unimportant what question I'm using as an example and I also feel it unfair to attract undue attention to the answer, as I believe it was posted in good faith.