All the hype on Google Analytics seamlessly working with your AdWords account may be bit too optimistic. And Search Engine Watch thread named Google Analytics improperly tracking PPC? reports on the PPC figures being wrong.
doesn't seem to be accurately tracking the PPC conversions or goals.
SeanW in the thread said that he emailed Google about this and in response received a reply that said something to the effect of;
They're having problems importing the cost data from AdWords, and claim it's their top priority to fix, ETA "a few days".
Forum discussion at Search Engine Watch Forums.