I thought this but looking at the table they haven't. After a draw today they are on +1 points (http://www.bbc.co.uk/sport/football/league-one/table).
Think it may have gone on last season. (http://www.goal.com/en-gb/news/2897/championship/2012/02/17/2912867/football-league-confirms-portsmouths-10-point-deduction).