Seen a great deal of griping about getting support for this issue, hopefully it's not true. I installed Parallels 3.0 today on a SR MBP, 2.4 Ghz, 2g RAM, running 10.4.10. According to Get Info, PD is Build 4128.0. All permissions are repaired on the disk, just in case, and there is a working copy of Windows XP that boots properly in Boot Camp at the other end. I installed Parallels, and it seemed to automatically detect a Boot Camp partition, and helpfully named it "My Bootcamp". Wonderous said I, only to be disappointed. The configuration for the VM is shown here: When I start the VM, the PD dock icon turns into a hourglass themed version of itself, the Bootcamp partition (helpfully named BOOTCAMP) unmounts, and then remounts, accompanied by the following error message: I'm puzzled. I've tried reinstalling PD, restarting, and a variety of dark rituals. Little help?
Please update to the latest build, it might not give you that error. If it still gives you that error, then please post the contents of your Home->Library->Logs->Parallels->Bootcamp.log and Home->Library->Logs->Parallels->BootcampOSP.log files.