Other mistake: The sex tape was only filmed with one camera (on the iPad) however, when Jay and Annie watch the tape back together at the end of the movie, it is filmed from more than one angle in some parts.
Other mistake: While asking Napoleon to pull him into town, Kip is putting on his roller blades. They live on a gravel road seen in other shots which would be impossible to rollerblade on while being towed behind a bike.
Other mistake: When Buster Moon is calling out the solo acts for final selection he calls Daniel's name with no megaphone and Daniel can hear his name fine. Then when Buster is making the selecting the solo finalists, Daniel cannot hear him, requiring Buster to use a megaphone to talk to him.
Other mistake: At the beginning, when one bad guy is sitting on a bench with a newspaper, we can read the date October 21, 1959 at the top. But, we also read Nov 3 1970 on the same page, under the mugshot of the Boss being released from jail. (00:04:20)
Other mistake: When Sandy goes to the gas station, where his card is declined he tells the clerk there is something wrong with pump 5 but if you watch, he is parked at pump 8.
Other mistake: When the fake TV ads for the Stuff are shown, the container states "1 Pint (.474ml)". 0.474ml is about an eyedropper drip of liquid. The decimal point shouldn't have been there.
Other mistake: In one of the opening scenes where the boys ride to the baseball game, the fishermen they pass make a rude comment towards them. In response, you hear Joe ring his bicycle bell and see them flip the men off. The bicycle has no bell.
Other mistake: On the ship, Wall-E leaves dirtmarks everywhere, except when he's hiding behind an EVA pod. (00:37:20)
Other mistake: The lead is loaned cassettes of 'Darkness on the Edge of Town' and 'Born in the USA' by his mate and then quotes a lyric from 'The River' which he hasn't listened to yet.
Other mistake: When Dean compliments Les on the great driving making up for a year of boredom, Les looks around up in the air in a direction away from the car, then suddenly says "there's a scratch on my car." He then looks down on the car at the scratch and shows Dean. He said the "scratch" line before actually seeing it.
Other mistake: After Kelly and the twins climb out of the sewer tunnel and hear footsteps, the twins sit atop the steel grating pretending to cry while the rest hide below. All the walls and paintings behind the twins are the very same ones behind Kelly, Taylor and Andrea later, when they've finally reached their target painting, in a different area of the gallery. We can even see the square of wood planks covering the area of the steel grating seen earlier. (01:13:35 - 01:24:00)
Other mistake: Catherine lives in apartment 1 on the first floor, but she goes in to apartment 4 on the second floor and right in front of Neil's apartment. (00:06:26 - 01:10:28)
Other mistake: Tony Danza's character introduces himself as "Tony." When the credits are rolling at the end of the movie, we see that his character's name is Terry, not Tony.
Other mistake: When Dr. Pincus looks at the three laxative bottles, there's a close-up of one of the bottles. The label on the bottle reads "Take 1 tablet daily with a glass of water" and "Qty: 50". Doesn't sound like a label for a liquid solution. (I noticed this in normal playback then paused to confirm it.) (00:09:10)
Other mistake: When Homer drives through the barrier the second time (leaving the lake after dumping the silo) pay very close attention, his car smashes one portion of the barrier, but his car passes through a second portion of the barrier without breaking it. (00:23:50)
Other mistake: Among the credits for the film's music are "principle first violin" and "principle second violin." The correct word is "principal."
Other mistake: When Robert Downey Jr. lowers the helicopter onto the freeway to yell at the truck driver, he is very close to the truck driver, so close that the truck driver can even hit the helicopter. Why does a long haired man standing underneath a helicopter not have his hair blown around?
Other mistake: Jack's parents were at a Halloween party when his mother went into labor. Later in the movie when he's asked by his teacher he says his birthday is September 12th.
Suggested correction: The movie doesn't specifically say this is a Halloween party. This may simply be a costume party which can and do happen multiple times a year.
As you stated, it doesn't say it's a Halloween party. In fact, there's signs in the room that say "Beaux-Arts Ball."
Other mistake: When Amanda's driver brings her to the cottage for the first time, he tells her he can't drive her up there because he would not be able to turn around, but the same driver picks her up at the cottage when she is leaving and presumably has no issue turning around at all, and you can see it's a flat field in front of the cottage.
Other mistake: When Gregory has read the note from Fregly, he realises he put his thumb on a booger. When we see Greg on the floor, the note should be nearby. Instead it is several feet from him, in line with the bin. This is strange as Greg only dropped it and the note didn't flutter over there as Greg only turned when he hit the floor. In fact, the movement should've moved it closer to him. In line with the bin is even weirder.