When Jules and Ben are chatting on Jules's bed in the Fairmont Hotel in San Francisco, and she's telling Ben about Matt cheating on her, a flush covers Anne Hathaway's chest and rises up her neck - probably due to the emotion of the scene. A couple of shots later, and the flush is gone; this was probably a take or two down the track. Then towards the end of the scene, the flush returns.
The day Ben sees Matt cheating on Jules, Matt's outfit has changed three times within the span of an hour or so. In the morning he's wearing a brown shirt. When Ben see's him leaving, it's now green. When he drops Paige off (just an hour later), he is now wearing a red plaid shirt, and black t-shirt.
Ben pours a large amount of syrup on Paige's pancakes, but in the next shot, the syrup remains unchanged from before.
During the Tai Chi scene in the opening montage, DeNiro's double hides behind a man wearing red, then in a closer shot DeNiro is shown while the other man has disappeared.
During the San Francisco hotel bedroom scene, Jules' robe keeps opening and closing.
During the funeral scene, flowers are on the casket. Flowers are not present at Jewish funerals.
In the 3rd act, the funeral for Sam Newman is a Fairhill, where none of the mourners or the staff are wearing kippot, a must for a Jewish funeral. And since a Jewish funeral would never be held on Shabbat (Sabbath), Fiona shouldn't be referring to the post-service meal as a "shiva", which is the first seven days of the Jewish mourning ritual.
When the Audi SUV is racing down the street, it has a NY State license plate on the car. When the car is viewed from the front, there is no plate visible. NYS requires two license plates on vehicles.
It's endearing, and highly conscientious of Ben to come in early and clear up the junk table. But being completely new to the office, and knowing nothing about the contents or purpose of the stuff in the piles, there's no accounting for where he could possibly put everything, which is why it all wound up at the junk table to begin with.
You cannot spray for bed bugs, it doesn't kill them but tends to multiply them. (Ann Hathaway is on the phone in the car that De Niro is driving and the voice tells her they need to spend money to "spray for bed bugs".) Bed bugs are very hard to get rid of, typically a (very costly) heat treatment is what exterminators use.
Jules and Ben eat pizza and have a beer at the office, after which he drives her home, this after Ben replaced Jules' driver after he drank from a "brown paper bag". But Ben had one beer and Jules had said she has another hour of work before leaving so Ben would be well under the legal limit. The driver Ben confronted was drinking from a flask, so probably spirits with a far higher alcoholic content and driving immediately, and could well have been drinking before as well, so could easily have been over the limit and impaired.
When Ben sits down at his new intern desk, he opens his briefcase to put everything out. All the items are in perfect order. Gravity was not affected inside the briefcase; all items should have been moved to the bottom.
When Jules is writing the email she accidentally sends to her mother, the subject line is blank. She then puts the phone down to take a call from the warehouse. When she picks it back up, the subject line says "She's A Terrorist".
Ben's glasses reflect the blank green screen on his laptop when he is supposedly confirming there are no new messages.
When Ben is awakened by a phone call from Becky, he looks at the alarm clock next to his bed. The second hand on the clock is not moving.
No reasonable person who runs a fashionable business with in-demand products would ever proudly display their company logo on an urban warehouse such as this one. Robbers could easily use a stolen truck to do a smash and grab.
While collapsing at the bar after drinking too much Jules says thanks again, but when she says this her mouth isn't moving.
On the last day, Jules wants on two occasions, apparently more or less first thing in the morning, to call Townsend in San Francisco. She should remember that because of the time difference, she should not call before noon, 11:00 am at the earliest.
Ben comes up with the idea to steal Jules' mom's computer so she can't read the email Jules sent by mistake. They discuss how if there's a password, Jules will simply buy her mom another computer. A personal email account can still be reached via the internet on another computer, so replacing the computer wouldn't have helped.
When Ben first arrives for work, the new interns are told to take a seat at the "interns' table". After sitting down, Ben needs to be shown how to turn on or activate his computer. For him to receive his email right away, either he needs to have logged in first, or he must be using a computer which had already been set up for him. Neither seems to have happened.
While reading the senior internship pamphlet, Ben states the video submission must be made on Youtube or Vimeo, but also states what formats it should be saved in (mpg, avi, etc). Uploading the video to either Youtube or Vimeo will render the file format irrelevant, as it will be automatically converted.
Jules mother says in the car that women who sleep less than 7 hours a night are 38% more likely to experience major weight gain. During Becky's mini-meltdown, Ben says women who sleep less than 7 hours a night gain 38% more weight.
It's not obvious at first, but when Ben and the interns invade Jules' mother's house he trips over the corner of the rug on the landing at the top of the stairs.
Jules says that her parents have been "studying me sleep", which is bad English. She should say studying me sleeping, studying my sleep, studying me in sleep, etc.