Often lose spell checking and other auto-correction

Many times while working in a document, I find that I’ve lost auto spell-checking and other corrections. It’s the darnedest thing and seems completely random to me.

I type a misspelled word on purpose, and it doesn’t underline it form. I type --, and it no longer changes to an emdash automatically. Even smart quotes stop working. Now I need to figure out how to convert my entire project’s smart quotes to get things back to center.

Any ideas?

Are you using Lion? If so, this thread (as well as other similar recent ones) may help: [url]https://forum.literatureandlatte.com/t/spell-check-bug-information/18081/4].