r614: only kick out a revision if it's a duplicate
r614: only kick out a revision if it's a duplicate

shopittome/cruisecontrol.rb,onrooby/cruisecontrol.rb,thoughtworks/cruisecontrol.rb,thewoolleyman/cruisecontrol.rb,thoughtworks/cruisecontrol.rb,wpc/cruisecontrol.rb,onrooby/cruisecontrol.rb,onrooby/cruisecontrol.rb,wpc/cruisecontrol.rb,shopittome/cruisecontrol.rb,thoughtworks/cruisecontrol.rb,shopittome/cruisecontrol.rb,shopittome/cruisecontrol.rb,craigw/cruisecontrol.rb,thewoolleyman/cruisecontrol.rb,Zelnox/cruisecontrolrb,thoughtworks/cruisecontrol.rb,shopittome/cruisecontrol.rb,thoughtworks/cruisecontrol.rb,Zelnox/cruisecontrolrb,onrooby/cruisecontrol.rb,onrooby/cruisecontrol.rb,shopittome/cruisecontrol.rb,craigw/cruisecontrol.rb