The last bit is wrong, at least in French. The upper case representation of “côté” is “CÔTÉ”. It infuriates me to no end that Microsoft does not accept that letters in caps keep their accents. I can believe that it might be language-dependent, though.
Also, a search engine that does not find “œuf” when you type “oe” is broken.
Very interesting article, though. I wish more developer were aware of this.