I know the built-in spell checker is not working and has nothing to do with WordPress, but I'm referring to Firefox's spell checker. Right now as I'm typing this, spelling errors are underlined in red. But in the post itself, it is very inconsistent.
For example sometimes spelling errors won't be underlined. And this time round the first word is underlined, and subsequent typos are not underlined.
But with Safari it works with the whole thing, not just the first word.
Anybody can advise?