I looked to see if anyone else has had this problem, but don't see another report... I upgraded from 4 to 5 today and have XP Pro SP 3 (work) as well as Win 7 RC (play) VMs. I get terrible graphics artifacts with each. With XP Pro, displaying just Excel, the spreadsheet grid sometimes does not display - minimize to dock and restore helps (Crystal mode in this case) - but then there are odd gray rectangles blocking out the spreadsheet. In windowed mode, Autodesk DWG Trueview - a simple 2D CAD viewer - flickers when panning, or when dragging the window. Never had any problems like that with Desktop 4. In the Win 7 RC VM, a 3D viewer that uses OpenGL has a little less then the lower left 1/4 of the screen occupied by a black rectangle in which crazy wireframe stuff appears. I have no problems on my Mac, nor did I in Desktop 4. I set both machines to 256 MB graphics memory and the box for graphics acceleration is checked. I'm running Snow Leopard 10.6.1 on an 8 core Early 2008 Mac Pro with 10 GB RAM and have 100's of GB of free disk space. any Ideas? Karl PS I brought up Google SketchUp in Crystal mode on the XP VM, but did not see any issues in a minute or two of testing (unlike the issues above that happened immediately).