OS X 10.4.6+VPC 7.0.2: 2 days, 2 BSODs

>I have not experienced *any* problems since VPC 7.0.2 + OS X 10.4.4 with
>one VM running Windows XP SP2, 256MB on a Powerbook G4/1.33 1.25Gb RAM.
>
>First XP-SP2 BSOD:
>
>I quit VPC and save state to upgrade to 10.4.6.
>Apply OS X 10.4.6
>Repair permissions, check disk integrity, everything OK
>Start VPC, right after VM restore, XP BSODs, sigh.
>Reboot Windows and run chkdsk and also analyze disk with latest
>Diskeeper Pro 10, everything seemingly OK.
>
>Second BSOD (same VM):
>
>I wanted to test a bootable CD image without creating a new VM. So I
>shutdown XP normally and captured an ISO for the immiment reboot.
>
>Reboot the VM and VM starts running bootable ISO, which is an XP setup
>disk. Get to Setup screen and choose to Exit Setup. Machine restarts,
>and I uncapture CD at post.
>
>VM begins to boot into XP-SP2, right before getting to Explorer desktop,
>BSOD.
>
>Repeat reboot, chkdsk, Diskeeper analysis, everything is OK. System has
>been up since then.
>
>I'm just disturbed that a system which been 100% stable since 10.4.4 has
>BSOD under VPC twice in two days since OS X 10.4.6. *No software* has
>been installed in XP to coincide with these changes.
>
>Not looking for explanation but posting for others.