I've been in contact with forrestv on github, if anyone else who is having this problem can send him their log file he would appreciate it. There is a "tentative" fix available on git but I'm unable to test it atm, so if anyone can try it & provide feedback, that will also help forrestv out.
if you want you can try "test.warp2pool.eu:9332" I'm doing a test with the latest version p2pool and bitcoin classic (0.11.2).