Initially, while Elmer is chasing Bugs around the grandfather clock, and the view is from the right-hand side of the clock, the calendar on the wall by the grandfather clock shows July beginning on Tuesday. When the clock starts chiming 12, the view shifts to being from the left-hand side of the clock, and the calendar changes, showing that July now begins on a Sunday.
Going by the deductions as listed in the special delivery letter, Elmer is actually left with a final balance of $902,934.04.
The calendar next to the grandfather clock shows July 1 being on a Sunday. In 1942, when this cartoon came out, July 1 was on a Wednesday.
When the grandfather clock chimes 12 o'clock, it chimes at least 14 times. Grandfather clocks of that type should chime the same number of times as the hour.
Telegrams don't have postscripts.
As is customary, Bugs Bunny wears a towel when stepping out of the shower, however he is shown not wearing the towel any other time.
Neither Elmer Fudd nor Bugs Bunny casts any shadows.
Elmer Fudd misreads the postscript to the telegram aloud. He says "harm" instead of the printed word "hurt." He also misreads the special delivery letter as "You now inherit three million dollars." The letter says "You thereby inherit three million dollars."