Just got the set and opened it up. The ANH disc seems to have encoding problems during Chapter 26. I ran through this chapter on three players.. a Panasonic, an Xbox and a PS2. All three of them experienced the problems at the same points. Macroblocking, freezing, etc. I haven't watched the entire disc, though I suspect that the entire first pressing may have these issues. I inspected the disc and it's free of any visible defects or damage, so this does appear to be an encoding problem.
Would any of you who also have your 2004 Star Wars sets mind helping me verify these issues? Check out Chapter 26 on ANH and see what you can find, please.
Looks like I'm going to have to return these and wait for a second pressing. Damn.