My biggest gripe;
Obi-Wan "There you will learn from Yoda, the Jedi Master who instructed me."
I would like to point out there is a bigger line hinting at Yoda being Obi-Wan's MAster which people missed in the ESB:Revisited thread... When trying to explain the line or suggest a change to it;
Obi-Wan "Was I any different when you taught me?"
.... Actually Luke I learned from Qui-Gon.... >.>