About a week ago, I installed Leopard on my brand new entry level MacBook Pro after erasing the HD three times. Additionally I tested in disk utility the Leopard CD and my HD before and after installation, which every thing checked out OK. After installation when taking the pointer across the dock it seemed a bit choppy and not fluid as it is if the dock is positioned on the left or right side of the desktop. The most noticeable jerkiness is when I load dashboard off the dock. I would say 90% of the time it does NOT load fluidly and either pauses or rushes choppily into position. However, when I load dashboard from my application folder it is completely smooth and looks flawlessly. I reported the problem to Apple after the phone tech couldn't fix it and decided not to go see a Mac Genius. My biggest concern is that there might be something wrong with my MacBook Pro since I just got it on October 24, but likely this should be resolved with an update (fingers-crossed). I went back to Tiger coupled with the other problems i have read about online such as the security/firewall issue. I want to wait for an update and try again, but I miss Leopard.