My memory is sort of foggy, but I seem to remember there being some issue with Quartz Extreme (or maybe it's successor?) that shipped with Tiger but wasn't fully activated because it wasn't complete. I remember reading speculation here on MacRumors on when it would be activated (I guess it was thought that it would be updated through a 10.4.x update in Software Update). Did this ever get fully activated? Or maybe I'm thinking of something else that had to do with Core Video or Quartz 3D or something. Anyone remember what I'm talking about?