I am seeing very slow performance when using spaces and expose in 10.6. I am on a mac mini with the 9400m graphics chip. It worked perfectly in Leopard, and now it runs at what appears to be 1fps. Sometimes it doesn't even seem to animate, it just jerks into place, from starting point to the end. I realize one solution could be "do a fresh install" but that seems like quite the pain at the moment, and is extremely undesirable. The upgrade worked perfectly on my macbook pro with similar specs. Is there anything I can reset or reinstall that might refresh the graphics performance?