Well, that's a bit sensationalistic. I really like the cube effect when going fullscreen, but I was thinking it would be cool to see that as an alternate environment, so that I'm not faced witha big Parallels window when I go back to my Mac environment. This would kind of give a "dual personality" appearance to my MBP, especially if it automatically flipped back and fortth as the mouse attempted to cross over the edge between them on the cube. To simulate this, I pushed the Parallels window mostly off the bottom of my screen before going to full screen mode. What I end up with is a black screen when I get to full screen mode. When I then attempt to go back to Mac mode (Alt-Enter), Parallels quits. (It actually looks like a crash, but I don't get the "application quit unexpectedly" message.) This is 100% repeatable. I experimented, and it seems to happen whenever I try to go to full screen when my Parallels window's centre point is off screen. If at least half of the window is still visible on my display, it works as it should; if less than half is visible, I get the black screen, and then a crash when I try to leave full screen.