Try two:
They seem to have eaten my post, so I'll try again...
I'm getting a bunch of "false positives" running a version of CPUMiner that does X11 (I've used it on DarkCoin before).
Any clues what that means?
Are you talking about the idlebug?
My miner doesn't work neither for X11. It send few share then it stay idle. I do not put any setting in the password. Also for Scrypt I've never had problem with NiceHash before (as long as I don'T not add price settings in the password).
It's not going idle, but with the debug flag going, it's giving me:
[2014-05-12 16:34:45] DEBUG: hash > target (false positive)
Hash: 000000cb67446e5ce7e7b05fa59385a2f3f5fbbcbbc70dab5c5be84a5f6316b3
Target: 00000031ffce0000000000000000000000000000000000000000000000000000