Quite often I roll back the edit because the code was edited after the answer was posted. In such situation I feel obliged to post a comment why did I rolled it back. Not a biggie, but annoying. Can we address the situation? I can think of two ways:
Lock the question as soon as it is answered. Sound a bit too drastic.
Provide a radio button with a rollback reason, and post the reason as a comment.
Thoughts?