When Taki and the hotelier get up to fight Jin, the chessboard they were playing with earlier disappears.
When Jin steps on his sunglasses, the debris surrounding his trainer suddenly vanishes in the same shot.
When Taki and the hotelier are playing chess, the black king and queen are in each other's starting squares.
When Taki and the hotelier are playing chess, the hotelier makes an illegal move and moves his bishop forward in a straight line (not diagonally).
Hideyuki Kikuchi's name is spelled "Hideyuki Kikuti" in on the English prints produced by Streamline Pictures.
When you see Taki's boss (the man that is playing golf), you will notice that he is standing next to a shade of blinds, his body is NOT transparent through the shade of blinds: it's the light filtering through the other blinds the gives such an impression, since it often aligns with the blinds behind him.
In the Streamline dub, Makie describes Taki's electrical salesman salary as "twenty-four hundred a month" (2400). However, Taki and Ken's bet is made with a 10,000 yen bill, apparently more than Taki's wage. Makie's figure is likely in US Dollars, to benefit the American audience, but this still doesn't explain the sudden change in currency.
Makie is referred to as "Ma-key" throughout the Manga UK dub, when the name should be pronounced as "Ma-key-ey". At one point, Taki even refers to her as "Me-key".
The Hotelier calls Giuseppi Mayart "Joseph" while playing chess with Taki in the Manga UK dub.
Joe, the bartender in the Manga UK dub (called Ken in other versions), calls Kanako "Kinako".