You are correct in that the old saying was "40-140". It was easy to remember for sure.
I will say that my state regulatory agency says 45-135 is adequate for their purposes. That's a 10 degree spread from the old danger zone criteria.
I will also stress that while these "rules" are important, they are meant for commercial applications where sickness & disease can spread quickly through a population. At home you don't have to follow these rules to a "T". We commonly ate dinner at Granny's from the lunch leftovers...she kept them in the cupboard right beside the plates & glasses. Not at all saying everyone should be doing as Granny did, but rather food safety regulations can be a bit extreme for the home environment. Do what you feel is best for your family.
"BBQ...it's just heat & meat" - Circa 5/10/11 - Quote by Cook