In the celebration party scene Roscoe mentions that he and his fiancé are vegan, but in the scene shortly after, of them in the kitchen, Bianca is seen cutting up cheese, which is not part of a vegan diet.
In the baseball game scene, Reggie (Mike Epps) slides to steal third and gets Roscoe's jersey dirty. When he stands up and notices, he tries to brush the dirt off the #44 on the right side of the jersey. When the camera cuts to Roscoe and then back, the left side of his jersey is dirty and the right side completely clean.
(at around 50 mins) A cast member goes sneaking into the shower where a female is showering. She asks him for the "feminine wash" and he never ever hands it to her, but in the last shot of her holding up the shower curtain she has a can of something in her left hand, even though she never takes her hands off of the curtains the whole time.
Near the end of the movie, when R.J., Bianca and Jamaal, arrive to the airport, the car is very low because of the weight of the bags on the roof-top. However, when R.J. takes off the bags, the car's suspension doesn't lift. Even if the car had the trunk full, the suspension should lift up a little bit.
The characters seem to be playing fast pitch softball, but one of them is seen allowed to lead off her base, where she is almost tagged. Leading off bases is not allowed in fast pitch softball until the ball leaves the pitcher's hand during a pitch.