Simon

Corrected entry: Approx. 30 minutes into the film there is a banquet at which King William (Jim Broadbent) gets blind drunk and shouts at his sister-in-law, the Duchess of Kent (Miranda Richardson). Shortly before his 'outpouring' watch carefully the wine glasses being filled. Or not. One glass becomes more empty - the film has been reversed.

Simon

Correction: This is intentional to show that the King is quite drunk and is not completely himself. You see right after the reversed pouring of the wine he blinks his eyes and looks confused.