He also doesn't touch on why she doesn't burn up in Earth's atmosphere. One thing I really like about the box set is the Salkind/Spengler commentaries on SI-III. Since the narrative put forth about the first two films in particular has mostly been Donner's version of the events, it was...
I suppose that, once you've accept that he can fly, shoot rays out of his eyes, etc., turning back time doesn't seem unreasonable. The real logical problem with that bit of the movie is: If he can fly that fast, why the hell couldn't he catch both rockets??????
I've only ordered from Amazon.co.uk once before but I was actually amazed how quickly I received my shipment: If I recall correctly, I had it within a week of placing my order.
Every listing I have seen online indicates the US and UK releases are identical, including all disc-based content (sd too!). It should be playable anywhere. The only difference I've seen noted is that the UK release features the UK ratings on the cover.