I haven't heard the DVD mixes for many, MANY years but I remember the most distracting thing for me were the different takes. There were scenes, where literally each line of one man's monologue was taken from a different take! So each line was in differrent pitch, different speed, different sound quality, different tone ... For example when Tarkin speaks to Leia, or when Han talks to the gang on the Falcon during the holographic chess scene etc.

The 2011 mix is much better because Matt Wood who did it KNOWS what fans hate :-) And he intentionally fixed or "minimised" the stuff