Other mistake: The tenant board member tells George that Mr. Eldrige in apartment 8C has decided he wants the new apartment. However, the new apartment in question has a 3-digit number - 808 I believe. This indicates that the building would not have single digit numbers and letters (Such as 5E, 8C, etc.) as part of its numbering system.
The Man in the Long Black Coat - S2-E8
Other mistake: Eric Idle is called Dr Melvin Whale, but according to the subtitles he is called Dr Melvin Mile.
Did the Earth Move For You? - S2-E1
Other mistake: Viv and Phil are waiting in his office for the power to come back on after the earthquake, but you can see lights on in the building across the street. (00:16:30)
A Toadally Magical Adventure - S1-E14
Other mistake: When Bully uses the wand, the fence around Toad's house can still be normal-sized despite Kootie Pie having enlarged it. (00:08:32)
Safety in New York (or, Bertie Sets Sail) - S3-E1
Other mistake: When Tuppy goes to turn off the burglar alarm for Wooster, it's behind a hidden panel with a sign saying "Alarm Switch" above the panel. Why bother putting the switch behind a concealed panel if you're then going to label it? (Unless you're doing it for a viewing audience). (00:35:00)
Other mistake: When Fay is talking to Lowell over the walkie talkie, when she is giving him the recipe she is not pressing the button to talk, but Lowell still responds.
Other mistake: We know the girls all go to school together, but when they are walking home in the opening scene, they all meet up coming from different directions.
Suggested correction: They don't approach from very different directions. All of them are still basically in the same area of lawn and trees. This is possible depending on what they do after exiting the school building. Maybe someone walked in another direction so they could briefly talk to other friends, etc.