ever since purchasing, i've noticed Safari on the Pro frequently doesn't load up sites into cache as smoothly as one would like. A lot of the time it does, and it runs websites silky smooth, but other times i scroll down and must wait for the page to load. This is easily rectified by closing all background apps and re-loading safari again. All is now smooth and pre-loaded again. I presume this is a bad optimization issue. Not utilizing the large 4 gig of ram correctly. It doesnt happen all the time. Maybe a 60/40% split towards the good? I'm sure its an issue that can be resolved in software updates as 4 gig of ram is surely enough to give constant smoothness whatever i have open in the background. Anyone else notice websites not always preloading giving brief blank waits when browsing sometimes?