Corrected entry: When George and Kramer go to the newsstand to get change for the $100 bill, the newsstand has multiple copies of Entertainment Weekly on the news racks. This wouldn't be a mistake if it had the same person(s) on the cover but each copy has a different person(s) on the cover. The show probably just grabbed whatever magazines they could find to take up space on the news rack.
Xofer
1st Sep 2004
Seinfeld (1990)
4th Aug 2004
Seinfeld (1990)
The Hot Tub - S7-E5
Corrected entry: Towards the end of The Race when they spot Jean-Paul in the lead, if you look over to the right of the road you can see a vehicle with a man filming the scene with a camera.
Correction: This isn't so unusual; a race like that would attract at least the local news, who would want to film the winner.
Correction: Not necessarily, sometimes magazines like that have multiple covers (sort of collectible covers); TV Guide often does that with multiple stars of a featured program.
Xofer