It's still only mid-morning, but "ruin-time library" might already have won Typo of the Day.
@simontatham On a college essay I meant to write, "the threat of unexpected..." But instead I wrote, "the treat of unexpected..."
That got a big ? In the margin from the professor.
@jendefer any time I want to write "theatre" I tend to find my fingers have gone for "threat" first and I have to back up and try again.
This is particularly annoying when I'm typing "security theatre", because the typo usually reverses the meaning of the sentence!