Stack Exchange staff have announced an upcoming change to the way answer acceptance works.
Currently, the original poster of a question can accept one non-deleted answer. This does several things;
the question poster receives 2 rep, and the answer poster receives 15 rep;
the answer has an added green tick mark below its score and vote buttons;
the answer itself is pinned to the top of the list of answers, regardless of sort variable.
This change will affect the last of these behaviours, removing the "pin to top".
Staff have indicated this may be configurable per site - each individual site can have this behaviour turned off or left on (with the default setting yet to be determined by consensus and research).
Please indicate by voting on the answers below, which setting you would prefer.
Downvotes will be ignored for this purpose, as they add no useful information. Just upvote one, or both or neither. Feedback is being collected on September 19th. I realize I'm a bit late to this Meta post but the vote's can still be used to determine the functionality after the 19th. In about two-weeks time this post will be updated and locked to preserve results.
Feedback was collated on October 3rd, giving sixteen days to make a decision. This post has been locked to preserve results.
Our consensus is in favour of removing the "pin to top" behaviour for accepted answers.
Shamelessly stolen from Sports.SE.