It is well known that the mono mix, stereo mix, and the 6-track mixes of the original Star Wars each contain different takes of Beru’s dialogue. (Listen to the SE mix for 6-track differences. There are some small differences from the 1993 THX and the 1986). Some people think that a different actress entirely dubbed for the mono mix, but after listening to it many times, it seems to me that it makes more sense that the same actress did it; they just read it in a completely different manner.
Here’s a completely different question, though; I have info stating that the original “unfinished” mix (of which there were only 9 copies) DID contain Fraser’s original voice performance, before she was dubbed, with a thick British accent. Do any of you know any more about this?