Are we having another split? My p2pool is verifying only half of the total shares in the chain at the moment, and estimated current payout is about half of what it usually is.
I'm running p2pool tag 0.8.5.
The only way to tell whether you're on a split is if the displayed pool hashrate is significantly less than what it actually is, which is currently ~200GH/s. Your estimated payout can decrease if your payout address changes, which can happen automatically if you restart Bitcoin.