In the first game Guru Pitka hits Darren on the head with a stick of yellow flowers (right after he tells him he is not allowed to fight with anyone). Most of the petals fall off. When the camera cuts back as the Guru turns to his assistant the stick is full of petals again as before.
In the mini-office scene, after Jane holds Coach Cherkov back from attacking Pitka, he is shown sitting back in his chair, rolling it forward. However, after the camera cuts to a different angle, he is suddenly sitting back into the chair again.
During the first game after Pitka joins Roanoke, he is hit hard at the opening face off. From the overhead shot, we see that he has lost both gloves. In the following close up shot, he once again has his right glove back.
During the fight in the first hockey game, Roanoke clearly hits Jacques Grandes hard enough to drive him away from the net. Moments later, Roanoke is driving Grande's head into the post when they should be in the corner, not in front of the net.
At the end on Game #3, played in LA, they move from the locker room (Staples Center is on the back wall) into a suite, proceeding with their conversation. You can see the seating to the 500 level of Toronto Blue Jays (Roger's Center/SkyDome) in the window.
During the scene where the Guru Pitka is talking to Darren Roanoke at Niagara Falls, the two are seen standing at the lookout next to the Bridal Veil falls. However, on the one-shot of Guru Pitka, he is standing on the Canadian side of the Falls, where you can clearly see the lookout they are supposed to be standing on.
During the first game between Toronto and LA, Roanoke and Grande get into a fight. The referee informs Roanoke that he has been suspended. Referees cannot suspend players from future contests, and would order a game misconduct in this situation.
During one of the Stanley Cup games Roanoke hits the puck above his head. He then hits the puck out of the air while it is at head level and scores a goal. This goal would have been disallowed since a player is not allowed to touch a puck with his stick if it is above the normal shoulder height. This infraction is called "high sticking the puck".
According to the voice-over commentary, the sixth game of the series took place in Toronto. However, the seventh game also took place in Toronto. According to how home ice advantage works in the NHL playoffs, the same team cannot host both game 6 and 7 of a series. Also, Game 5 should have been in Toronto, as teams alternate two home games through Game 4. The correct schedule, had the Leafs obtained home-ice advantage, would be TOR-TOR-LA-LA-TOR-LA-TOR.
When Coach is asked to stall, he calls a time out. The play by play commentator reports Toronto taking its "last" time out. This implies they have multiple time outs. In the NHL, a team is only allowed ONE time out per game. The same error occurs later on, the coach is asked to stall again to which he replies "We're out of time outs" and then fakes a heart attack.
The movie depicts the teams wearing the 2007 version of the Stanley Cup Finals badging on the chests of the jerseys, however the teams are wearing the RBK Edge styled jerseys that were introduced for the 2007-08 season, the badging is wrong with the jersey styles.