I am using Parallels in full screen mode together with Virtue to switch between the XP desktop and OS X. I use Alt+Tab to switch desktops in Virtue but this seem to cause Parallels and XP to behave a bit odd: 1. Left (single) clicks on objects in Windows produces a property dialog for the object. Right-clicking still gives a context menu. 2. The keyboard stops accepting normal input. Switching Parallels to windowed mode with Alt+Enter or Ctrl+Alt and back restores the correct behaviour. Also, any use of Ctrl+Alt with another key (emulating AltGr in windows) also results in normal operation but without changing from full screen making Alt+Enter and Ctrl+Alt the common denominators for this particular problem. I admit this also could be some kind of feature in XP still unknown to me that I have managed to activate by using Alt+Tab if it's not a plain bug. Another slightly annoying mouse related thing is that OS X will intercept Ctrl+Left click and emulate a right click for me which effectively prevents me from making random multiple selections in Windows. Still, Parallels seem to be coming along very well. Keep up the good work!