This episode inexplicably uses the opening titles used in the previous two seasons, meaning the new shots of Sue Ellen, J.R. and Donna revert back to the older ones. As the main cast roster had not changed however, this was unaffected by the error.
Pam tells Mark that not everyone has seen all seven wonders of the world like he has. In fact, the Great Pyramid at Giza is the only of the seven ancient wonders that has not been destroyed over the centuries.