As much as I love Mavericks, there are little minor niggles here and there which I don't see as bugs but rather oversight on Apple's part. One is that when you activate Mission Control with a four finger gesture, you cannot exit it back to your window in the same movement like in Mountain Lion and Lion. Instead, you have to remove your fingers of the trackpad and another swipe down. I really used to like the fact that you could enter and exit it in one movement to quickly see how many windows you had open. Another niggle is that I find the dock a lot harder to access now in full screen mode, requiring a slower, more vertical swipe downwards at the bottom of the screen to appear. Before you ask, I have sent these off to Apple feedback but just wanted any users opinions on these too.