Garage Sale - S7-E18
Corrected entry: As Michael is getting ready to propose to Holly, he stops in the foyer and says, "This is where Toby announced that he was going to Costa Rica. Happiest day of my life." This is a discrepancy, as Michael was in New York partying with Ryan and Dwight when Toby made this announcement.
Corrected entry: When Deangelo Vickers is found by Andy in the break room making a chocolate dessert on the coffee hot plate, Deangelo panics and slides the dessert off into the trash can with his left hand. Then when he exits the room he hits the wall above the door frame with his right hand, leaving chocolate smudges.
Correction: After having just watched this scene, his hands are off camera long enough for him to have brought them together (likely in anxiousness, since he almost reneged on his promise to himself to not eat junk food, and he was having a little trouble getting into the rhythm of the office).
Correction: Michael wasn't there when he announced it to the office so he may have heard it in the foyer from Toby there after for the first time.