They did indeed use different versions on some releases (US/UK) - Thomas has just remastered a deluxe edition which should be out soon and will fill the gaps and more (thanks TD!) - In the meantime, this will do nicely - a great, great album :)
I am not so keen on the CD version, I prefer the vinyl. It seems they remixed or used different takes of some of the tracks, i.e. Radio Silence as a good example. This motivated me to start digitizing my vinyl albums.