i forgot: my machines are E7600@2.8 and E7400@2.8.
the compilation was done on the E7600, with ATLAS compiled with gcc 4.3.3 and gfortran 4.3.3, and nwchem compiled with icc 10.0.026 and ifort 10.0.026. then the program was moved to the E7400, and again it runs fine
the parallel starts as well, it just doesnt actually go to the calculation and freezes like that