Stats are back. I'm going to be migrating them to another server some time soon which should eliminate a lot of these issues.
There is a minor artifact in the stats data (visible on the hash rate graphs) right around when the stats started having issues the other day. The hash rate data for about a 2 hour time period is missing from the stats database. I will see if I can easily pull this data over from the core database and get it fixed on the stats side. If it ends up being too much of a PITA I'm probably going to just forget about it though.
This does not affect earnings in any way. The reward system database (core database) has all of the correct data and rewards are always calculated from the core database. It is basically just a stats artifact reflected in the hash rate graphs. The blocks found in this time are reflected properly.
Thanks for your patience everyone. Also, I will be doing a manual payout to catch up the majority of the queue within the next couple of hours, as well as get NMC payouts caught up.
-wk