Not sure what is happening but i seem to have an issue with your pool.  I have mined on OzCoin and CoinOTron and everything is good when I started mining here yesterday during the DDOS attacks I was getting such a large number of (unknown-work) shares that CGMiner kept killing the pool and going to my backup.  My stales are showing between 20 -30% here.  Ihave not changed any of the settings for my cards from when I mine on CoinOTron.