When Claymore goes to leave his office at the beginning of the picture, he doesn't close the coat closet door all the way. But, in the next shot of his secretary, the closet door is fully closed.
HR production charts erroneously call assistant director Gilbert Kurland "Bert Spurlin."
When Calvin Claymore crosses off the last item on the list of Washington DC points of interest, you can see that items 15 and 16 are both the Chamber of Commerce.