On January 8th, 2008, Apple announced a new fantastic Mac Pro computers. A lot of us immediately has bought them with enthusiasm. Since the first days some problems was signalled on forums and discussions groups about strange freeze behaviours (with screen corruption) during normal usage. The latest Leopard MacOsX and graphics update didn't fix the problems: - http://www.xlr8yourmac.com/systems/2008_mac_pro_reports.html - http://discussions.apple.com/thread.jspathreadID=1365277&tstart=0 - http://discussions.apple.com/thread.jspamessageID=6243136&#6243136 - http://discussions.apple.com/thread.jspamessageID=6568862&#6568862 - http://discussions.apple.com/thread.jspamessageID=6236970&#6236970 - http://discussions.apple.com/thread.jspamessageID=6398518&#6398518 - http://discussions.apple.com/thread.jspamessageID=6558111&#6558111 - http://discussions.apple.com/thread.jspamessageID=5885550&#5885550 After two weeks it is not possibile to ask refund or replacement of the Mac, so we the undersigned demand Apple to fix the issue, releasing a software update or replacing the Mac Pros hardware part that causes the issue.