There were also some examples of sloppy editing in the updated edition, like multiple uses of the word "perimetre" which the author acknowledges was an 'incautious find-and-replace from the US English "meter" to UK English "metre"' https://qntm.org/antimemetics#komment6913d2eb6c240

Which is especially odd because the author (Sam Hughes) lives in the UK and wrote the original in UK English, but apparently wrote the rewrite in US English. For example, a chapter in the original was titled "Case Colourless Green", but in the US edition of the rewrite that chapter is "Case Colorless Green" (without the 'u'). So Hughes, a native UK English speaker, wrote the rewrite in a non-native (to him) dialect, then had it (lazily) translated into his native dialect.