ckolivas/cgminer — comment on commit baddb82ad9a15889cdf2a3d728ca5b588b88c9a0
File:  line 0
By forrestv:

This treats 32 bytes of a block header starting at 64 bytes in as a hash, and tests it against the target. That area includes four bytes of the merkle root, the timestamp, bits, the nonce, and a lot of trailing null bytes, which are what is letting it match the target. I'm not sure what you were aiming at doing here ... but it makes no sense.