hey, after getting leopard utd i decided to try out bootcamp to play some games. after installing xp i noticed there was considerable lag when starting up my macbook and opening applications as well as intermittent random shutdowns. thinking that it was a leopard related issue i took it to the genius bar but they had no idea what the problem could be because the hard drive and everything checked out fine. so when i got home i decided to get rid of the partition since i do not use it that often anymore and i can immediately see improvements in performance; almost just like when i got the macbook. i dont know why it had such an adverse affect on my macbook, but i just wanted to share my ordeal in case anyone else was going through similar problems.