I just marked this question--Why is the gradebook not showing scrollbars in Safari for one user?--as Assumed Answered to see how it would appear in the search results, and not surprisingly, it disappeared from the "Open questions" filter and moved into the "Answered questions" filter. Unfortunately, when I went back to the discussion to change the status from Assumed Answered back to Not Answered, I couldn't find this capability anywhere.
So oops--and help! How do we undo this? (I've posted this in the Coaches Group as well.)