This is because
- I need to type so quickly
- the spell checker doesn't know the difference between HTML and ordinary words, so every second word is underlined - I can't see the real mistakes from the false ones.
- There is no way to tell it "next time ignore this word, OK?"
But today all that changes! I discovered "Microspell". It's wonderful! I just told it to check my entire site, and was able to fix about a hundred typos that I missed before. Hooray!! I can't guarantee that the site is typo free - after all, this is me we are talking about - but it's getting better.