  In this short note, I point out that [p,q] does not equal (i h-bar), contrary
to the original claims of Born and Jordan, and Dirac. Rather, [p,q] is equal to
something that is *infinitesimally different* from (i h-bar). While this
difference is usually harmless, it does provide the solution of the Born-Jordan
"trace paradox" of [p,q]. More recently, subtleties of a very similar form have
been found to be of fundamental importance in quantum field theory.
