I'm guessing that there's an unexciting explanation for this, but I noticed an old post [1] that was authored by "Anonymous" (from back when the forum allowed posting as a guest, I think?) but it was edited by Satoshi:

Does anyone know what's up with that post?
Maybe it's one of Satoshi's (although it's in a distinctly different style), but he didn't want his name attached to it?
Maybe it's not his (more likely), but he edited it as a moderator? But then, why the edit? I'm not sure how moderation worked back then, but this post seems unlikely to have contained a spam link or anything objectionable.
Any insights appreciated!

[1]
https://bitcointalk.org/index.php?topic=237.msg1985#msg1985