I recently ran into this issue. Greenhopper 6, the new Scrum Board and Epic feature (which is pretty cool). You can select the little colored sqaure next to the Epic and choose "Mark as Done". This makes it disappear from the board. Which is kind of nice. But what if you find out it really wasn't done? How can you get it back? When you open the issue associated with the Epic, you'll find that its status field is unchanged. Yes, unchanged even though you marked it as "Done". Hmmm... See answer next...