The only place I've ever read that L:ucas didn't like TESB is in Simon Pegg's autobiography - and I don't think he mentioned where he'd found that out. I've never really believed it but I think it serves a lot of fans to go along with it.

For the record, though, there is nothing of Leigh Brackett's screenplay in the film so anyone thinking that all that is good about this movie is down to them is really fooling themselves I think. Lawrence Kasdan replaced Brackett - he didn't work with her - and I think the general consensus is that he did a fine, fine job.