In the leagues I run, ties are allowed during the season. During the playoffs, teams make out a tie-breaker lineup along with their starting lineup. Tie-breaker lineup consists of 5 players, one each from 5 different positions, and are compared total points first then position by position if needed to break the tie. If they are still tied after all that, the team that was ranked higher going into the playoffs advances.
Fantasy Football Junkies Anonymous meetings held weekly on Sundays... and Mondays... and sometimes Thursdays.