Seems you are saying you recently restarted it and lo and behold it has the same error despite being updated code...
I use p2pool for litecoin and for merged mining, I have seen that message before but am not seeing it right now. I think I git pulled within last few days. (I tend to from time to time anyway.)
-MarkM-
Well, I noticed that I couldn't access the stats page, so I logged into my server and checked the screen output and it gave me that error.
So I killed everything, downloaded a new P2Pool from ForrestV github, downloaded the new LTC client, then I re-indexed the blocks, once that was done I started everything back up and I still had the same error.
I am wondering if this is some kind of attack or miner error causing this.