That'll teach me to trust the bloody spellchecker. Lots of rude words it treats as mispellings, which means they don't slip by unnoticed. (Try it.) But it doesn't see "pubic" as rude enough apparently.
Our local Childminders' Association once organised what it advertised as a "Fundraising Pubic Display". And they didn't even have a Public Entertainmnet Licence. Or a Pubic Entertainment Licence.