Corrected entry: Mr Bean gives the collection tin back to the salvation army band leader when it is full - there is a girl with long ginger hair standing to the left behind Mr Bean wearing a black coat. The band leader asks Mr Bean to hold the baton while he puts the collection tin in his car - the ginger haired girl is now wearing a red coat and holding a bouquet of flowers, but when the band leader returns, the girl is back to wearing the black coat and her flowers have disappeared.
Corrected entry: When Bean starts making up his own tunes whilst being in temporary control of the band, it is quite obvious in some shots that the band members are not following his instructions and are actually playing the tunes from the music sheets fixed to their instruments.
Corrected entry: Bean supposedly unplugs the lights on the outside of the Harrods building when he is testing his own set of lights, but if you watch closely, some of the Harrods lights go off moments after the others. (When they're plugged in again, the same sort of thing happens: some of the lights come on moments after the others.)