Visible crew/equipment: At the beginning of the movie after Jess and Pinky have finished shopping, there's a shot of the guys playing football in the park. If you look closely, the end of a microphone is shown leaning into the top left of the screen. The mic moves a little, and then is moved back.
Continuity mistake: In the scene at Jess' house after the wedding, her mom and two other ladies are sitting on the couch with their feet up. In the first shot of the feet, there are two coffee cups visible, one with roses or some other flower(left) and one checkered blue with flowers (right). In the very next shot there are three coffee mugs on the table, the extra one in between the first two and coming from nowhere as the woman on the right was obviously not holding one. (Even if it was in her left hand and unseen, her arm was up and the checkered mug was closer to her.).
Factual error: When Jess arrives late at the final match, she is brought on as a substitute. Yet, the referee should know about the possible substitutes before they are brought on - he didn't even know about Jess. Jess said she wouldn't be able to make the match due to her sister's wedding. Therefore, she would have been removed from the team line-up.