Red Superfly
You creepy little stalker
The age thing is very odd.
Sebastian Shaw looks fifty going on sixty in ROTJ. Throw on a couple of decades for Obi-Wan.
Remember, Obi-Wan, as stated by Lucas, was an old man of seventy/eighty. If you remember Obi-Wan was the one who was going to die of old age in the final chapter and leave Luke on his own. Because Lucas didn't know if he'd get a green light for a sequel, he killed off Obi-Wan in Ep IV. The mentor dying of old age idea was given to Yoda which he invented after Ep IV. The main point I'm making is that Obi-Wan would have been close to natural-death-age in Epsiode IV, so it doesn't add up.
In Episode III, being twenty years earlier, that would mean Anakin would look late-twenties, early thirties and Obi-Wan would look fifty. But they don't. Obi seems to age fourty years in the space of twenty.Like I said, odd.
Nitpicky? Yes, but they really shoulda nailed this one.