I have a mid-2010 13" Macbook Pro (Mavericks 10.9.1) and this issue has been bugging me for awhile: I have my gestures set to swipe between spaces with four fingers. But a lot of the time, I will end up stuck about 1/4 of the way into the new space. When I use the gesture again, I will jump past the desired space, into the next one (jumping two spaces over with one gesture). For example, I have my Desktops set: 1) Desktop 1 2) Mail - Full Screen 3) Desktop 2 4) Calendar - Full Screen If I am using Desktop 2 and want to switch to my Mail, I will use the 4-finger gesture, and become stuck with 1/4 of Mail - Full Screen showing and 3/4 of the Desktop 2 showing. But when I try to use the gesture again, my Mac will rapidly jump across the Mail - Full Screen, into Desktop 1. This is extremely annoying. Other times, the Space-Swiping works, but seems less responsive than I am used to. (Again, not every time.) This problem does not happen every time I swipe between spaces. I don't remember this being an issue on Mountain Lion, though I can't say whether this started with 10.9.1, or 10.9.0. Could this be an issue with the graphics card/driver? I have reset PRAM/SMC several times recently. I try to repair permissions, but there are no related permissions problems that I am aware of.