Suddenly, new VMs I am transporting from exisitng XP systems are corrupting after one or two days of use on some users Macs. I've downgraded systems to 6.0 build 11828 due to the issues mentioned on the forums with 11990 or 11992, but it doesn't make seem to make a difference. The strangest thing is that it doesn't happen on all Macs, and the Macs it does happen to are different (Core 2 Duos, i5s, 10.5, 10.6, etc). Does it make a difference what version of Transporter was used originally. I used the latest Transporter for Parallels Desktop 5.0. I'd like to find the Transporter for 6.0 build 11828, but I could only find it for 11994.