hi so i just got a new 21.5 inch imac a few days ago, and i used migration assistant to move everything from my macbook. it displays .avi files that are really 350 mb as 366 mb. why is this happening ? and even when i download new ones that are 350 mb they show up as 366 mb. before i used the migration assistant i used this plug in for quicktime called Perian on it when it was brand new, but i think its erased now cuz i transferred all my data. could this be the cause ?