In the copying room, the hands of the clock on the wall behind Amelie do not move first at all, even though several minutes should have passed. A couple of hours later they are shown to have moved.
Fubuki's moles flip from one side of her face to the other during certain scenes.
When Amélie sorts all GmbH clients in the same folder, her superior explains her that "GmbH is like Ltd in English or SA in French". GmbH is not SA in French, but SARL (Société anonyme à responsabilité limitée).
Some computers show a Windows desktop interface inexistent in 1990.
Although the film is set before the outbreak of the first Gulf War, Windows 95 is shown running on computers used by the office staff.