Hey everyone, I just upgraded from an original white Macbook (1.83 CD) to an Aluminum Unibody Macbook (2.0 C2D) and to make the switch, I just swapped hard drives (took the one out of the white - 320GB - and put it in the Unibody) and have been using it like that for the past 2 weeks or so. It seems like things are sometimes a little "wonky" with the lovely beachball making an appearance far more than I would prefer (I have 2GB of RAM) and apps like Safari are crashing more than I'm used to (running in 64-bit mode). My question is four-fold: 1. Could it be driver-related differences between the two Macbooks that is causing this? 2. If so, should I reinstall Snow Leopard to correct this? 3. If I just pop the disk in (I'm running 10.6.2) and click "Install," will that overwrite all of my existing data? (I only ask this because with the upgrade from Leopard to Snow Leopard, data was not lost) 4. Does this have nothing to do with any of the above and I just need more RAM? Thanks for your help!