This was never an issue before, but now I notice it now that I have many answers accepted as the "accepted answer". We receive +15 rep for an acceptance. We receive notification in our reputation tab about "acc +15". However, when someone de-selects the answer, our rep decreases accordingly, but we never receive any notification on which question changed. I just wanted to know which question changed is all. Am I not seeing this somewhere or does this not exist yet?
This was implemented last night, you'll now see unaccepts in your reputation history (in the user profile).