During the first of two final Das Boot competitions, the beer in the second Germans glass goes from a dark beer in one shot, to a pale ale in the next.
When Fink is trying to explain the boot on the chalkboard at their training area, he circles the toes of the boot continuously leaving a pronounced circle. When they cut back to him talking, it is now just a single perfect circle.
When Landfill is drinking the beer from the vat to escape death, he drinks approximately down to his head. However when he is found the vat is full
The first night in the "Training Room", sunlight is shining through the slats at 2:00 am.
Landfill is sitting in the middle of the car seat on the way to meet Barry and refuses to move. When the car pulls up, he has suddenly moved to the left.
Team England wears the Union Jack as an emblem, which is the flag of the UK, not England. They are also referred to as "Britain" and "British." The error is underlined by the fact that there is also a Scotland Team, who would have equal claim to the Union Jack flag and the title "British."
(at around 24 mins) The Indian team enters for the Beerfest carrying their flag upside down. Saffron should be on the top.
In the scene where the brothers decide to create a drinking team, the month is already October when he flips a full year later to a fresh "October" page. On a real one-year calender, there would only be one page for October.
During the fight scene between Landfill and Cherry, several shots show Cherry's much thinner stunt double fighting.
In the very first drinking competition against the Germans, you can see the tubes carrying the beer taped to a German's neck.
The beer in the last 'Das Boot' challenge is all clearly CGI (except for Gil; "Landfill II") as the level of the beer does not match the contestants' mouths.
When the cuckoo clock is smashed onto the floor, you can see that it has no internal workings. Moments earlier, chimes sounded and a little maid came out.
When USA and Germany are playing turbo quarters, if you look very closely you can see that the German on the end never actually picks up the quarters they just appear in his hand as he gets close to the stack revealing the use of CGI.
When the crowd is chanting "Das Boot" in the first Das Boot challenge, their lips do not sync with the "Das Boot" chant on the soundtrack.
When the guys challenge the Germans at their first Beerfest, the Germans toast with plastic pitchers, but they sound as if made of glass.
In the scene after Fink comes in with the frog/monkeys, you can see the hand of a crew member come up from under the bar and shake the bag. Every other actors' hands are in plain view.
During Octoberfest when the giant barrel hits the little kid you can see the safety mat he lands on as he flies backwards.
One of the English drinking team is clearly copying an Australian accent and sounds nothing like any accent from England.
When they return to Munich the second time, the cut to Marienplatz and the Frauenkirche in Munich is quickly followed by a shot of taxis in Berlin, around the Hotel Vier Fruehling am Zoo.
The Beerfest lists it as a country, but Tobago is an island that is part of the country of Trinidad & Tobago.
Albeit a movie, there is no way anyone could sail a submarine to Colorado. There is no river or body of water with sufficient depth.
When Todd and Jan first meet their German cousins at the first Beerfest, an Alaskan flag can be seen hanging next to the Canadian flag in the background.
Todd plays in the final game because the Germans claim he has not participated in any of the events, which breaks the rules of Beerfest. However, he is seen (poorly) playing Beer Pong against the English team shortly after the competition begins. One possibility is that every team member must participate in every round.
When Jan and Todd go to recruit Landfill for their team he states that while he was in jail that he converted to Islam and then praises Allah. Later after the first night of training when his wife finds him passed out on the floor and performs mouth to mouth on him she pulls a piece of meat out of her mouth that he tells her is ham, that is forbidden for followers of Islam to consume.
During the quarters game in the American-German finale, the German requests that the table be put at "30 meters". The table is moved back, but nowhere near the 30 meter mark.
To the member that stated that the British team was just faking an Australian accent. They have obviously never heard a Londoner speak. England has a plethora of different accents just as the United States does.
When Landfill's wife is giving him CPR in the kitchen, she administers chest compressions to the right side of his chest, instead of the middle-left, about where the heart is.