I've seen this elsewhere, but I'll add my two cents. In OS X, with Parallels minimized, CPU usage is around 60% which has a huge impact on battery life on my MacBook Pro. I'm looking forward to a future release addressing this problem. The beta is so good now, I've already orderd a copy. Thanks for the product.
Hi Dave, Parallels CPU usage when guest OS is in idle state is definetly our bug and will be fixed in nearest update.