Continuity mistake: When the fembot Robin Swallows, and a male assassin at the party attempt to murder Austin, Robin gets a knife in the back which stays there even when they get blown out of the window. As they're falling, notice that before she turns over it's still in her back, even when Austin moves her in front of himself to shield his fall. The only problem is, with the knife still in her back Austin would've been really injured when they hit the ground. However, when they land, the knife mysteriously disappears. (00:28:30)
Other mistake: In the scene after Mini-Me's and Austin's fight when Austin is sitting on the space toilet to "eject" Mini-Me he picks up a copy of the London Times, as seen on the cover page of the newspaper. On the last page of the newspaper there is a weather page showing a map of the United States. Why would the London Times have the weather for the United States instead of Great Britain?
Continuity mistake: In the famous "fight scene" with Austin and Mini Me, we see Mini Me picking Powers up in a Gorilla press and turning him around. Well, when the camera is closing up on Mini Me, he is standing still, twisting him round. However, when the camera isn't close-up on him, Mini Me is turning round.
Continuity mistake: After Austin and Felicity have crossed the street in London and have sat down at the cafe, where Burt and Elvis are playing, Felicity has a red handbag with her. She places the bag on the table whilst her and Austin talk about the future. When Austin says "care to dance" the bag is still on the table. They both go to dance, and the table is taken away by a woman towards the edge of the screen. The scene goes back to Austin and Felicity dancing for a second. The woman can now be seen with two chairs, but no table or red handbag.
Continuity mistake: There is a scene when Austin and Felicity spend a day on the town, go back to Austin's shag pad, then separate for the night. The next day they are back in the same exact clothes as yesterday (after a clothes change piece the night before).