Or maybe QA'ing a 0day patch just takes time. I can't begin to imagine the amount of third party software and application configurations (multiplied by the numb

Or maybe QA'ing a 0day patch just takes time. I can't begin to imagine the amount of third party software and application configurations (multiplied by the number of windows editions and localizations) they need to run through to make sure a somewhat of an architectural change doesn't break assumptions and thus 3rd party compatibility too much.