Since 3170 I've noticed that scrolling is really jumpy. I'm using a macbook pro core duo, 2Ghz with 2GbRAM. I've allocated 900mb to parallels and win XP SP2 get 812Mb, and I've set the video memory upto 32Mb (was normally set at 16mb with similar problems). I see the symptom when scrolling down a word or onenote document in office 2007 or down an internet page in IE 6 or firefox 2. I use the two fingered scroll on the macbook pro's trackpad and the page jumps erratically as i scrol sometimes jumping ot the top of the page and back to the bottom, essentially making scrolling ineffective. scrolling with arrow keys works nicely, with no problems. I only have acrobat 7, office 2007, and firefox installed on my VM, I have no USB peripherals connected. Any ideas how to corret this? RC2 was fine. Thanks, Edward