Not sure if it's Proclaim or Mavericks but my projectors are my 3rd screen. Sometimes the menu bar shows on my projectors when i click on something on my 2nd monitor and sometimes it doesnt. I can go back and forth between the 1st and 2nd monitors a few times and then randomly the menu bar pops up on monitor 3 (projectors)
Maybe im just not understanding how the new menu bar works. Im a windows type guy!