So the ending credits for The Muppet Show were a little different between the US and UK broadcast, with the UK broadcasts having the credits closer to the side of the screen as opposed to the center, and more importantly the guest stars name was in the end credits in the UK version. When it comes to reruns and video releases, about half of the first season episodes have the UK credits, with the guest stars name, and only a handful of post-season one episodes are presented with the UK credits. And yet it seems like most of the first season guest stars whose names seem hard to spell or pronounce* (Charles Aznavour, Twiggy, Mummenshaz, maybe Peter Ustinov) are presented with the US credits.
In fact, it's weird that the first season DVD set seems to only have the UK credits on episodes that also have those credits in reruns. The DVD releases remastered the original master tapes (with the original opening, no less), so it's not like they were using the same copies that were being shown in reruns and the Time-Life releases. In that case, shouldn't they have either all been the versions with the UK credits, all versions with US credits, or a different mix of the US and UK credits than what was in reruns?
*I first saw the Twiggy and Mummenshaz episodes a few years before I got the internet, had trouble figuring out how the names were being said, let alone spelled, and was annoyed when I watched the end credits and saw that it was the version that didn't spell the guest stars names.
I assume that the reason the Elton John episode is on DVD with the UK credits (while the reruns and Time-Life DVD have the US credits) is due to it including English Country Garden (the Muppet Central review of the season two DVD speculates that it had that extra skit because they found a longer master tape, which in that case makes me wish they'd end up including versions of episodes with deleted sketches).
And both DVD releases of the Harry Belafonte episode have the UK credits... Another thing that makes these versions of the episodes different from the US versions is that they don't fade to black after the opening or closing numbers. With "Turn the World Around" continuing into the credits, it looks better for it to not fade to black before Kermit ends the show, though I would be interested in seeing that version. I'd also be interested in seeing the "UK version" of the Spike Milligan episode, to see how the transition from closing number to Kermit ending the show looked. Ditto with any episode where the "goodnights" took place on the same set as the closing number (as opposed to in front of the red curtains).