M&S is one of the areas I work in, and there are quite a few things to examine. Hardware floating point implementations are one area. Compiler (internals and/

M&S is one of the areas I work in, and there are quite a few things to examine. Hardware floating point implementations are one area. Compiler (internals and/or flags) and assembly language differences (as author alluded to) are others. Heck, even a thread race condition might be showing up now for whatever reason.