Just to clarify, there was a link units reporting discrepancy that we recently cleared up. Aggregate earnings were not affected AT ALL. It's just that if you go back and pull reports on your historical performance, you may notice that a lower percentage of your earnings are now attributed to link units (and a larger percentage are attributed to regular ad units).
An email went out to all those who were affected, so I'm guessing a lot of you got it.
Your aggregate earnings have been correct all along, we were just a bit off in attributing them to link units vs. regular ad units. Now we've cleared it up and any reports you run now will correctly reflect exactly where your earnings came from.