Thanks for all the comments. I actually wrote up a ticket to Panasonic, and they couldn’t help me. What I ended up doing was a complete rebuild of the laptop with a clean install of Lion. I know. Drag. But, everything works as it should now.
During the rebuild, I created the smallest partition on the drive I could (in addition to the system drive of course), and put a completely clean image of Lion, with the P2 drivers only on there. That way, if I ever run into trouble during a shoot, I can always boot up into the clean install and copy the footage off the PCD2.