Thanks for the nice explanation of retcon, YIYF (can I call you that?). That Jango thing really is nonsense, isn't it? It's like, there can't be anything but perfect stormtroopers, but for one to actually bump his head must mean he has a birth defect! Heh. That might also explain how their marksmanship is described as "precise" in one scene, and then in the next, they can't hit anything.

One retcon thing I did like, however, was on the show Deep Space Nine, where the crew went back in time to the first Enterprise. It was during the time of "The Trouble With Tribbles." There's a scene where Worf, Miles and Julian are in a bar and they see those old human-looking Klingons. Miles and Julian give Worf a look like "those are Klingons? What happened?!" Worf's explanation was a simple line about not talking about that with outsiders. Simple, mysterious, and perfect! Kinda like how there was little known about Boba Fett. Then they managed to mess him up, too, just as they did with explaining the whole Klingon thing a few years later on Enterprise.