RPS, if it's unchecked that's pretty messed up! Try checking it, savign the pref, then unchecking it and re-saving the pref (maybe something didn't get written to disk last time you saved it).
Well the strange thing is, it's been unchecked there from the beginning...
And I know I have to delete it from my startup-item-list, but whenever I do that, it just spawns itself back the next time I reboot.