When the Miss America contestants are coming down the aisle in the stadium stands, the seat that Jerry is supposedly sitting in (seen later in the scene when he talks to Miss Rhode Island) is empty.
When George is talking to Buck Showalter about the jerseys the schedule on the wall behind them is a 1994 California Angels schedule not the New York Yankees.
When Jerry tells Elaine she could have been a Miss America contestant, he starts to look down at his hot dog. In the next shot, his face is pointed straight up and he turns to look at Elaine.
When Jerry calls Miss Rhode Island, a magazine sitting on George's lap has a purple square and an orange-tinted photo showing. It then cuts to a close-up of Jerry and then a longer shot of the two of them, and the magazine's position is changed and a different page is showing.
Miss Rhode Island's talent is an act with trained doves. In fact, the Miss America pageant had banned animal acts after Miss Montana 1949 rode a horse onto the stage, and he nearly fell into the orchestra pit.