i purchased an imac in early 2008 (20 inch/2.0 c2d). it was a fantastic computer but i soon realized that portability was more important to me so it was sold. now in 2009, i have the 2.0 aluminum macbook stock version. i've noticed since i've had the computer that one website in particular will freeze up on me. it's where i read my celebrity gossip (don't judge!) so it's quite picture heavy. i'll be scrolling through and it will just stop and i get the beach ball icon for a few seconds..over and over. i never had this problem with the imac. could this issue all be from the differences in graphic cards..or something more serious?