Other mistake: When Michael is playing with "Harvey" the computer, it says whatever he types. When we briefly see the computer screen, the entire dialog for the scene is already typed out, in spite of it including text that hasn't been said yet and that Michael wouldn't know Harvey would say (such as "you ruined a funny joke, get out of my office").
Launch Party - S4-E3
Other mistake: In the beginning of the episode Meredith asks Jim to sign her cast. If you look closely, it's obvious that the actor John Krasinski signs his real name, not the name of his character, Jim Halpert. (00:02:35)
Other mistake: Michael states that he and Jan have traded in their two cars for a Porsche (for her) however from earlier episodes we know that Michael's Sebring is a corporate lease.
Other mistake: When Jim is editing the audiobook of Jo's autobiography, the waveform displayed on his computer program is inaccurate to the phonetics of the phrase being uttered. The crew of the show simply pasted in a random waveform of someone speaking a different sentence. There are a number of ways to tell it is inaccurate, but one is the periodicity of the waveform during the sibilant [s], which appear be noisy and not periodic. (00:15:20)
Other mistake: When Michael and Erin go back into Michael's office and start the video on Michael's computer, the "Play" button hasn't changed even though the video is playing. It should have changed to the pause button.
Suggested correction: He's only saying it's a corporate lease to egg Dwight on cause he tricked him into thinking he got the manager position over Michael when Dwight tells Jan he could run the branch better in the waffle house, but right after screams "That's my car!" several times.
When he hit Meredith with his car he started it was a corporate lease again though.
Yes, he tells Ryan the accident occurred on company property, with company property so... Double Jeopardy they are fine. To which Ryan says, I don't think you understand how jeopardy works.