It is indeed. We also got 5 clean sheets in a row in March 2010 in the first division season (4 wins and a draw), but we conceded after 12 minutes in the next game, the 4-3 win against Raith when Foran won it with the overhead kick. The 05/06 run of not conceding ended on the first day of the next season against St. Mirren, when we conceded after 55 minutes. Unless I'm wrong, our longest period without conceding a goal is about 515 mins, without taking into account added time. We're on about 375 at the minute.