During his solo number Dallas unfastens the side strap of his thong but in the next shot the strap is back in place.
During "It's Raining Men" Ken slides his suspenders off twice in successive shots.
In the striptease done in July, Big Dick Richie's pants clearly split at the side seam shortly after he takes off his shirt, in future shots, they are no longer split.
The black F-150 Mike starts off with clearly has the EcoBoost on the side in the first above shot of the truck (visible on Blu-Ray). Subsequent shots of the truck do not show the sticker.
During the hurricane party, Mike calls Joanna with his smartphone and briefly talks to her. Phone service is usually disrupted in or near a hurricane zone.
You can clearly see Channing Tatum's wedding ring on when he crosses in front of the camera after getting out of his truck when arriving at the construction site.
At the sorority, when Mike picks the girl up in front of the fireplace, her battery pack for her microphone is visible through her clothes.
When Adam gets up from the table about 10 minutes in, his sweatshirt is pulled up and his microphone battery pack is visible.
Despite Mike's rule, Portia (as spelled in the credits) is not named for a car; Portia is a character from The Merchant of Venice by William Shakespeare.