No need to check the LD, SilverWook. I now noticed that the screen-cap they referred to was from the UK-capture Nerfherder sent me. I cannot see these artifacts in yours.
Thanks for the help Rogue-theX.
If Jaitea's capture look as good as I think it do, going by his screen-caps, I will use that instead. But the 2004 DVD transfer will be used for the opening. It's really weird about the lack of green credits in the LD-master, I think there's a possibility they were white in the original 1971 theatrical release and updated for the 1978 re-release, it's weird in any case.