As for the brake clunk, I think that's a pretty common issue around here. I know that I will get the occasional clunk when I let off of the brakes after coming to a stop. Unless there is an excess clunk, or other associated noise, I think you're OK there.
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong, it usually turns out to be impossible to get at or repair."
-Douglas Adams, Mostly Harmless