P2Pool was updated to 13.4-25. It’s recommended to apply this update because it fixes an issue with block header timestamp. This issue could cause generation of invalid blocks.

SRC:
https://github.com/novacoin-project/p2pool/

Py2Exe:
http://sourceforge.net/projects/novacoin/files/p2pool_win32_13.4-25-g6da08c4.zip/download