So, I just found a typo in the last set of bookmarks I printed. I always check them carefully, but in this case it didn’t occur to me that it might be wrong: it was an apostrophe that looked okey-dokey to me, until I had the stray thought at half-past midnight tonight, Uh-oh. Is that apostrophe supposed to be before or after the “s”?
Turns out, there’s no apostrophe at all (although there used to be, long long ago (and it was after the “s”, because it was a plural — it’s before the “s” on my bookmarks, because I thought it was a singular possessive)).
But I don’t think I’ll feel too badly about it — when I went to their website, the same typo was on their front page.