On my i7-2700k@4,6GHz, the latest build
https://ottrbutt.com/cpuminer-multi/cpuminer-multi-wolf-06-09-2014.zip
seems to be slower, 240h/s on may 30 version, 220h/s at best with the above.
More/less cores did not help.

Guessing that Haswells get a boost while old Sandybridges loses out with the new optimizations.