Continuity mistake: Obi-Wan's braided hair keeps changing sides, and getting longer and shorter, most noticeably in the scenes around the underwater city. (00:13:40)

Factual error: The vents that Hunt and his sidekick crawl down at CIA Headquarters are standard galvanized steel box vents; they are very common in the building trade. Try walking or crawling down one - you'll make a noise like the sky is falling down. People will be able to hear you for miles. Every person in that building would know somebody crawling about in the vent system. (This error applies to dozens of films, not only this one).

Visible crew/equipment: At Hoover Dam, after the salute, when Defense Secretary Keller speaks with Lennox and Epps, the reflection of the white reflector screen is visible on Keller's glasses. What's more, the boom mic's reflection is actually visible within the reflector screen's reflection. Two for the price of one. (01:35:30)

Super Grover ★

Factual error: The main plot is that a teacher answering a student's question about Jesus in a historical context starts a legal firestorm. This is utterly preposterous. Teachers (and students for that matter) are 100% allowed to discuss religion in a historical context. They just can't do things like force other people to take part in religious activities (like prayer) or "endorse" a single religion above all others since public schools need to remain neutral. There'd be literally no case against her.

TedStixon

Continuity mistake: After Dory reads the wall map while she's in the glass carafe, when Hank hides behind the rolling cabinet there's a long shot of the corridor with him at the far wall, then in the next shot from behind Hank a drinking fountain has suddenly appeared on the wall to the left, between two pictures.

Super Grover ★

Other mistake: On one of the SHIELD monitors, "perimeter" is spelled "perimiter".

LizzieWD

Aibileen Clark: All you do is scam and lie to get what you want. You a godless woman. Ain't you tired, Ms. Hilly? Ain't you tired?

Revealing mistake: In many of the scenes taking place in outer space, if you look closely you can see polygon borders surrounding space vehicles (X-Wings, Star Destroyers, and even the Death Star) indicating the objects being superimposed into the outer space background. [This mistake may only apply to the Blu Ray version.]

Phaneron ★

Question: Several other answers and corrections state that the reddish liquid sprayed by the tripods was what essentially grew the red vines. However I thought I heard someone in the film say something along the lines of "using us (i.e. blood) as fertiliser". Can someone please clarify?

Trivia: In the original novel that the Shawshank Redemption is based on, Red is an Irishman which is where his nickname came from. In the movie, when Andy asks Red where his nickname came from, Red pauses and says "Maybe it's because I'm Irish" with a hint of sarcasm.

Continuity mistake: When the butler takes the mother and kittens to be abandoned in the countryside he is on a motorcycle and sidecar combination. During the trip the sidecar changes from one side of the bike to the other and back again. Also, when the sidecar separates from the motorcycle when the dogs are chasing Edgar, the wheel on the sidecar switches sides regularly as well.