Quite a few. Though spell-checkers have improved my spelling - if you get corrected every time you get it wrong, eventually you notice and start to pre-empt the spell checker and hence your spelling improves.
So have now got the hang of lots of them, e.g. embarrassed, but still struggle with (here goes) bourgeois (yup, needed spellcheck that time).
I think its stupid French words like that one I have most trouble with - their spelling follows completely different conventions. I guess restaurant is another one of them.
(Doesn't help that spell-checkers everywhere seem obsessed with forcing me to type in American English.)