The reports go as far back as October 26th. One member described it as, "earnings for october with low figure has been credited and debited in my history page. Totally confusing."
But it seems like many have seen this issue resolved a couple days ago.
Some people report it being fixed after emailing Google about the issue, but others say, it has yet to be fixed for them. Some are so concerned that they are printing out reports manually, just to have proof of their earnings for the month.
Forum discussion at WebmasterWorld.