jackpotcoin is going to adopt the keccak-only approach permanently. Meaning ccminer will continue working past block 6000.
see line 139ff here
https://github.com/rtc29462/cpuminer/blob/master/jackpot.cthe other hashing functions have been commented out.
I would have fixed it differently, but I wasn't asked

Christian
They have reverted the commit, and are back to multi-algo. I guess thats why ccminer doesn't work anymore