Here's an idea for resolved/unresolved. It's kinda complicated though.
I sign in and all MY unresolved topics are at the top of the list in another color, say green. If I don't look at them for say a week, they become an annoying color, light bright yellow and a message asking if topic is resolved. All other users see my topics like normal.
Something else...
After I read this section, I resolved one of my topics. BUT, after I posted my thanks, I had to re-enter the posts and hit the resolved tab. It would of been better if I could of marked it as resolved as I was making my 'thanks' post. If I overlooked it, mea culpa mea culpa.