You can find a Unicode Glyphs test file for Kindle at
http://www.freekindlebooks.org under "Unicode". Simple answer is that Kindle doesn't seem to support much other than a few DOS dingbats above U+0250 "Latin" and even then Kindle leaves off the diacriticals on many of the high latin letters. I have Kindle version 1.0 -- does anyone know how the versions have changed and why?