Errors in geography: Tom's phone (a Nokia 3210) is in its American, not European, packaging.
Continuity: We see Bridget struggling to pull on her granny knickers with nothing else on her lower behalf, but a few scenes later, Daniel pulls up her skirt to reveal them over her tights/pantyhose
Crew or equipment visible: The reflection of a camera crane is visible on the boot of Daniel's car as Bridget runs round to the passenger side.
Crew or equipment visible: When Bridget comes home from the party, we can clearly see a crew member's reflection in a picture frame.
Crew or equipment visible: When Bridget stumbles off the exercise bike, a reflection of the boom operator and his boom mike is visible in the mirror.
Continuity: After the fight, Mark swings his jacket over his shoulder and the sleeves are inside out. Seconds later they are through the right way.
Continuity: When Bridget and Mark are in the Bridget's kitchen making dinner, Mark's tie is pulled down off his neck and to one side. When the doorbell buzzes, the tie is neatly tighten to his neck.
Continuity: When Mark leans in to kiss Bridget outside her door (as Shazzer, Jude and Tom look on from the car), Mark's head is tilted to his right in shots of Bridget and to his left in shots of him so that neither character is obscured by the others' head.
Continuity: When we first see Bridget writing in her diary, listing the type of person she's not going to get involved with (with narration), she is writing on the left-hand page. In the next shot, she is at the bottom of the right-hand page.
Continuity: After the dinner party, Darcy is talking to Bridget at the bottom of the stairs and his position changes between shots.
Crew or equipment visible: When Bridget slides down the fireman's pole in Lewisham, a safety line is visible for a few frames.
Continuity: In the scene in which Bridget's Mum talks to Bridget about leaving her Dad, Julian appears and hovers in the background in one shot, and is gone in the next but reappears and repeats his actions from the earlier shot.
Continuity: While in the restaurant with friends, a brand new cell phone comes out of its cellophane bag twice. The first time, the bag is held upside down and the phone slides out into a waiting hand, immediately after, it is pulled out of the bag.
Continuity: At the married couple's dinner party, the level of wine in Bridget's glass changes. When she first picks it up it is half full, in the next shot it is full and in the next shot, it is half full again (without her having time to have consumed that much).
Audio/visual unsynchronized: As Daniel and Mark push their way into the restaurant, Bridget is heard shouting "No,no,no,no!" as she runs across to stop them, but her mouth doesn't move.