After installing SL on my non unibody Macbook Pro (Penryn 2.6), I have noticed a slowdown in Spaces. When I move a space to a different space, whether that space is empty or occupied with other windows, there is a lag in the movement as it is not 1 to 1. Even more so is the time it takes for the space being moved to replace the space it is moved to. Is anybody else having this issue and what can I do to rectify this if possible?