SilverWook said:

The Tusken's reputation is such they are "framed" for the Jawa slaughter in the original film. Why the stormtroopers want to avoid being fingered for local murders when the Empire is blowing up entire planets is anyone's guess. ;)

That's a really good point, I never thought of that before.

I know it's been said a million times but to me the unforgivable inconsistency is the presence of R2 and 3p0. R2 spends a lot of time with Kenobi and he has no memory of him in ep iv? Vader sees 3po later and he doesn't recognize him? It was so unnecessary to bring in Chewbacca, Greedo, Boba, Jabba etc. Where was baby Han and Lando? At least they were spared.