Corrected entry: When the meltdown is in progress Smithers says that Homer was hired under Project Bootstrap, yet in the episode titled "I Married Marge" we see that it was Mr.Burns himself that hired Homer.
Corrected entry: 40 seconds pass during the time period when the announcer says there is 1 minute left and 30 seconds left. Also between the announcer saying there is a half-minute left and 15 seconds left, 25 seconds pass. (00:08:10 - 00:09:20)
Correction: It's normal movie practice to show sequentially events which are intended to be in parallel (the alternative is a very ugly split screen). Between the announcements for one minute and 30 seconds left, Homer has a flashback and during the countdown from 30 to 15, we see the TV announcer explaining who will survive and who will not. The time in Homer's reality is correct.
Corrected entry: In the shot after Smithers asks Mr. Burns where his radiation suit is, Marge's knitting supplies have disappeared. (00:05:30 - 00:06:35)
Corrected entry: When Homer is sleeping in Sector 7G, the illumination of the room has changed. (00:03:50)
Corrected entry: When Smithers shows Mr. Burns the picture of his dog, he is standing to the right of him. Immediately after, he is standing in front of the TV monitors. (00:03:10)
Corrected entry: When the school bus stops at Springfield Elementary, it is visible that the bus stops on the sidewalk. (00:02:20)
Correction: Otto is driving. It is not impossible or a mistake for them to be parked on the sidewalk.
Correction: Although Homer is hired by Mr Burns in a later episode (when Bart visits the powerplant) Homer is fired by the twins' dad. He is then rehired under that thing Smithers said.