the way phoenix is spelt p-h-o-e-n-i-x pisses me off, it should be p-h-e-o-n-i-x. and people who get woman/women wrong, which is an extremely dumb thing to do, but happens more often than most i can imagine, aside from the obvious they're/their/there etc.
also, language changes all the time, what most regard as "the queen's english" is largely the minority in the uk nowadays, thanks to slang, multi-cultural social interactions etc. it's something that is inevitable and a constant.