According to what I've read in imdb, the scene in which Chewie scares the little black box droid in the Death Star did not appear on opening day. Does anybody know anything about this?

What I read on imdb seemed very certain about it, saying it was a "definite" difference and the scene did "NOT" appear in the opening day version.

Also, I read on imdb that actress who played Beru "was dubbed over in all but the original prints". What I gather from elsewhere is that it was on the mono that she was dubbed. Was she dubbed in anything apart from the mono? Can anybody explain what I read on imdb?