Hi folks, I have a late 2008 unibody MacBook Pro. I recently did an erase and install of Snow Leopard. Since then, I have been noticing times when my whole computer will lock up with the beach ball for about 10-15 seconds. During that time any music in iTunes will stop and I cannot change any apps or press any on screen buttons. I can movie windows around, but not modify them. After this time, the system will resume and I can continue. This happens about once a day. It might happen when I go to open a photo in iPhoto or click a video link in Safari or other things like that. I can't really pin it down. Anyone have any ideas? I cleared all the caches, repaired permissions... am I going to need to repeat the erase and install? Thanks!