I have a rMBP, a couple of months old and installed El Capitan on Wednesday. In iTunes Store, when I look at 'My Movies' (I have a lot), there is no problem scrolling the list up or down. However, when I go to the iTunes store, scrolling the list vertically using two fingers in the middle of the screen is very jerky indeed, not a pleasant experience. If I use the scroll bar on the right hand side instead, it's silky smooth. Anyone else seeing this?