I was aware of the fiance/fiancee difference, due to the fact that I was someone who read the dictionary (true story), but I always thought that the blond/blonde was a difference of language (maybe French?
Character flaws - a great list of ideas for screenwriters!
I stumbled across Elmore Leonard's Ten Rules of Writing and thought I'd post it. This is good advice, but I think a couple of them go a little too far. I'm sure you could get away with as many as 3 or 4 exclamation points in a word story.