The charge relates to the challenge by Joey Barton on Pedro Mendes that left 'Arry incensed and he was sent to the stands after half time for his outburst towards Mike Dean and his colleagues.
Redknapp requested a personal hearing and the FA Disciplinary Commission have warned him about his future conduct, although it probably wouldn't stop him having another outburst should another thuggish challenge of Barton's nature be made on a Pompey player. Funnily enough Barton got away with that with no punishment at all.
Good to see that the FA are consistent as always though...