This is a problem w/10.4.11 also.
Definitely same issues exist w/10.4.11 & latest P2 drivers, Duel drivers, and P2CMS. June 07 2.2 MBP 15.
SAFE BOOT mode works, but appears to be really slow.
Finder copy runs, but is not recommended…
Pulling 4GB & replacing it w 2GB (in a MBP that came w/2GB) works.
Jesse