Mr. Bean loses his watch inside the turkey, but at one point while he has the turkey on his head (as he says "No, no thank you!") he is wearing his watch on his left wrist.
Washing-up liquid bottle moves between scenes.
The Harrods exterior inexplicably has a crowd of bypassers, despite there being none in the establishing shot.
The scene where Bean drives off with a Christmas tree on top of car is reversed.
When Bean hands over collection to the Salvation Army conductor, it is obviously not money but paper in the tin made to look full.
After Mr. Bean chooses the ornament for his Christmas tree, he heads over to the counter and the shadow of the camera can be seen on the desk.
When Mr. Bean heists a tree from the local mall and drives away with it, a shadow (possibly from the camera crane) is briefly cast over a street sign.
It is customary to say "Happy Christmas" in most commonwealth countries. Ergo, the title should be "Happy Christmas, Mr. Bean."