I just got my brand new MacBook pro 13" on Friday (2.4GHz, 4GB RAM). I am obviously running the newest version of Snow Leopard and iPhoto. One of the first things I did was import 180 photos from my camera into iPhoto. The images are not huge (3.4MB each). After upgrading from a 2008 MBP, I was excited to play around with gestures on the new trackpad, and I was immediately very concerned with the severe lag I experienced in iPhoto. When I double-click an image in iPhoto (enter full screen) and pinch to zoom, and then use two fingers to pan over the image while zoomed in, I experience a lag of several seconds. So, for example, if I zoom on an image, I watch the screen do a choppy zoom for the next couple seconds. Similarly, when I use two fingers to pan over the zoomed image, I watch the screen do a choppy pan for the next 5-6 seconds before finishing the operation. Is this normal? I would understand if these images were huge, but these are from a standard Canon PowerShot SD camera (6 megapixels), so I would certainly expect the user interface to be smooth, especially considering that on my old computer running on Leopard (10.5.8) with iPhoto (7.1.5), I am able to perform the same functions with the same photos will no lag whatsoever (albeit without using a gesture trackpad). I did find a thread on this (from Sept. '09), which This suggests that Snow Leopard may be the culprit, but it doesn't seem too many are people experiencing this: http://discussions.apple.com/thread.jspa?threadID=2166089&start=0&tstart=0 Can anyone please tell me if you are experiencing similar lag in iPhoto, or if something is wrong with my machine. Thanks!