Other mistake: In the scene when Austin is rising out of the pool in the beginning, the water that shoots out of the platform he is standing on is actually going into the water shooter/sprinkler instead of coming out. This is due to reversing the film (so he comes out dry), but hey, it still looks weird.
Continuity mistake: After they defeated Dr.Evil, Austin and Vanessa were married six months later, so the year would have been around mid to late 1997 or early 1998 when they were on there honeymoon. But in the second one, it's 1999 and they are still on their honeymoon. Do you think that they would have had their honeymoon for a year and a half?
Deliberate mistake: When Austin is playing chess with Ivana, the pieces have been moved in impossible positions throughout their few moves.
Continuity mistake: In the scene where Mini Me shoots Mustafa with the blow-dart he is clearly on the left hand side, yet he hits Mustafa on the right side of his neck.
Factual error: When Austin is photographing his frozen self, you can hear a motordrive on the camera whirring away. However, the camera doesn't have a motordrive attached, and anyway is a Nikon F with Photomic head which doesn't have a socket for a motordrive.
Continuity mistake: All of the short dance numbers that separate scenes, even in the beginning of the movie, show Austin with his "bad" teeth - except for one.
Continuity mistake: At the end of the movie when Felicity Shagwell is with Austin in the 90's, they are in Austin's new pad. Felicity is wearing a multi-coloured top. After she turns on the lights and all the party goers enter, Felicity goes over to Austin. There, she's wearing a white top. How could she have changed so fast?
Revealing mistake: When Austin pounds on the glass tube, it's easy to see they are three separate panels of glass, rather than being sealed. Therefore, the gas inside could have escaped.
Visible crew/equipment: When Austin and Felicity are on Dr Evil's island unpacking the bag in the tent, you can see clear shadows of lighting equipment up the top when viewed from the outside as the men first approach. Some lighting would have been required to light the tent, but they look like film gear and there is an excess of it.
Continuity mistake: Watch the toppings on the cookie Mini-Me eats in the middle of the movie. Before Number 2 starts to tell Dr. Evil that Mini-Me bites, there is only one chocolate chip (or raisin) on the cookie. When Dr. Evil asks Mini-Me if there is anything he'd like to say, the cookie has more chocolate chips (or raisins).
Continuity mistake: In the lab scene (with the coffee gag) Basil looks much younger than he does in the 90s. However, earlier when Basil asked Felicity to plant the homing device on Fat Bastard, he looked the same as he did in the 90s. He should have looked younger both times.
Continuity mistake: When Mini Me is first ejected into space, you see him just flying backwards, yet in the next shot he is rotating freely.
Continuity mistake: When Austin is fighting with Mustafa at the side of the road, we see a red London telephone box. But if you look inside, you can spot a modern day push button phone, which weren't in phone boxes in the 60s.