I am using Photoshop CS6 Beta on a Mac Pro with OS X Lion. I love it so far! I just wanted to report a small bug I have been encountering with the new window tabbing composition (you know, the one that works like Windows Photoshop). In Windows Photoshop when I pull a window out of the tab set it remains in front of the items that are still in the tab set, even when it is not the active composition. In this version, when I pull a window out it will go behind the Photoshop window when another composition is selected. Since it falls behind the Photoshop window I have to constantly spread my windows in order to find it again.