I recently upgraded to the most recent build 5582 from 5160. The upgrade resolved some annoying alert message common to starting XP in Parallels but now a more problematic issue has evolved that was not an issue in build 5160. Specifically, the USB ports under 5582 are no longer reliable as demonstrated in my case with the use of my printer. I frequently have printer errors (inability to find printer in the USB requiring unplugging the cable and replugging, etc.). An email to Parallels support was received describing the issue as follows: ". Unfortunately after we implemented Bleckberry devices support in Parallels there were some general USB problems appeared. So, you should downgrade to 5160 to gain previous functionality of USB ports but Blackberry. Nevertheless you may try to establish your Printer as a network printer avoiding USB ports in 5582:" At least in build 5160 there errors were more annoying than functional. This problem is truly a PITA when you require printing under XP. Scott