Corrected entry: There is a black microphone visible for a second at the top of the screen when Jim, Oscar, and Pam are walking out of the building. (00:04:00)
The Dundies - S2-E1
Corrected entry: At the awards ceremony, Jim is shown sitting at a table with Ryan, Kelly, and Toby. Seconds later they are shown again with Jim at a different table, and Toby and Kelly in different seats.
Correction: Upon closer inspection, you'll notice that Jim is sitting down at a table while Toby, Kelly, and Ryan are standing at the table. Dwight begins his introductions for Michael as the camera pans away to show Dwight, and also pans to Devon. Then we see that Kelly and Toby have sat down at a table near Devon. When you see Ryan next, he's standing/crouching near Jim in order to hold the cue cards for Michael. So it wasn't that Jim switched tables, but instead, he switched during Dwight's intro. Kelly and Toby walked over to their table (with time to do so) and Ryan went over to his spot to hold his cue cards.
The Injury - S2-E12
Corrected entry: At the beginning of the episode they show a shot of Angela talking to Kevin by Stanley's desk. But then the scene cuts to Pam answering the phone near Jim, and Angela is suddenly at her desk. There is no way in that amount of time Angela could walk over to her desk.
Correction: Most TV shows don't run in real time, we don't know how much later the phone call takes place, Angela had plenty of time to walk to her desk.
Corrected entry: When Roy greets Pam's mom, he says "Oh, Marianne." However in many future episodes Pam's mom is always called Helene. (00:18:05)
Correction: She says "oh there he is"... Watch it again and listen close.
Correction: That is because they are constantly being filmed for a documentary. They do not try to hide the fact that there is a crew just outside the frame.