I've tried to use Intel MKL with numpy 1.8.0 and scipy 0.13.3 python packages.
When I use -O2 option for ifort scipy tests in scipy.odr subpackage fails everytime.
Using -O1 instead of -O2 results in passing the tests.
Here is detailed description of bug: http://software.intel.com/en-us/forums/topic/505993