Since I'm tired of waiting for Parallels to provide us with an update to fix this problem, I just tried the fix suggested by karmicscorpio and it WORKED! That is, using shared networking and then entering the MAC address of the network adapter as given by ipconfig/ all from the Command Prompt in Boot Camp. Since I changed the MAC address in the Virtual Machine configuration, I've successfully booted back and forth between Boot Camp and Parallels without an problem. That being said, I'm a little nervous about the fact that I get an "Activation Successful" message each time I reboot via Boot Camp. I'm hoping that I don't get too many of these messages and thereby un-activate Vista in either Boot Camp or Parallels. If I do, I'll be sure to leave a message here. In the meantime, users may want to try this fix while awaiting the (currently vaporous) update.
And thanks karmicscorpio!
Last edited: Apr 23, 2008