Jerry's girlfriend seems to live in apartment 5E. 5E is normally Newman's apartment.
After Jerry drops the tube of fungicide in Elaine's purse, the tube is again shown in Jerry's hands in the following shot.
When Elaine cuts her boyfriend a slice of cake she places on the plate on its side. It moves to being upright between camera cuts.
When Jerry and Elaine are eating the lobster, their forks change position between shots inconsistently with their eating.
Padiatrists go to medical school and have a medical degree.
Kramer is seen running east to the church on Delancey St. in Manhattan after exiting the subway. He is running toward the Williamsburg Bridge. Since the church in this episode is in Williamsburg, Brooklyn, Kramer should have stayed on the subway, crossed over the East River via the Williamsburg Bridge, and then have made his way to the church after getting to Williamsburg, which is in Brooklyn., not Manhattan.
When Jerry washes his the sound of running water is heard, but no water comes out of the tap.