It appears that there is a British release and an American release - two completely different covers, and even the titles are different ("Hitchhiking the Galaxy One Last Time", vs. "And Other Writings").

To sate my curiosity, I'm buying both, just in case they try to pull any nasty edits, like changing "Broccoli" to "F**K" as they did in the American omnibus edition. (The point being, of course, that Americans haven't enough sense to find "broccoli" funny).

RIP, DNA.