We just upgraded -- thanks for the heads up -- we'll watch for it and report back anything interesting.
We upgraded to the cloud last month and decided to turn that one off, so it's not even an option. It was the one marker that we couldn't come up with a consistent definition for so we never got a handle on how to explain it to users. And the fact that you can filter all content on it across the whole platform means it can be confusing for different groups who use it in different ways.
Maybe at some point we'll revisit that decision but for now it's off.
My company is (apparently) using Jive 7.0, and I just heard from someone else something that I also noticed: it isn't really obvious that the "Correct Answer" button is an action button, especially if there is only one reply in answer to the question. If there are several replies, then the question owner can see that button on all the replies; if there is only one, though, it appears to say "This is the correct answer!" rather than "Mark this answer as correct." Since it does not appear to be an action button, the user goes to the action menu, where the closest thing to "correct" is "success".
Perhaps rather than simply "Correct Answer", the button should read "Mark as Correct"?