If you run your own WordPress blog, you may be annoyed (like me) by the smart quotes feature that automatically turns pairs of regular quotes into so-called "smart" open and close quotes. I find this annoying, because if you cut-n-paste out of WordPress, these smart quotes can cause problems depending on where you are pasting to.
I found the wpuntexturize plugin which fixes this feature. Now my blog post use just regular quotes.
Not only are smart quotes an issue when copying and pasting, but smart quotes turn into garbage in any OS other than Windows, since there is no universal definition for the upper 128 characters.