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"UPDATE: The contractor/vendor that made the software commented on Hacker News with more technical information. They're a very classy shop and have handled this ... ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.hanselman.com/blog/WhyTheAskObamaTweetWasGarbledOnScreenKnowYourUTF8UnicodeASCIIAndANSIDecodingMrPresident.aspx>