[cyberbaffled]

I've posted the following in the Mobipocket corporation's forum, but thought I'd give this forum a shot at it as well.

I've 'built' a book using Mobipocket Creator, 'importing' a html file. The html file incorporates many mathematical symbols that display correctly when the html file is a component of an .epub file displayed using Adobe Digital Editions; or is a component of a .lit file displayed using Microsoft Reader. However, when displayed using Mobipocket Reader many unicode characters display using oddly substitute characters. Such oddly displaying characters include Greek letters and triple equality signs signifying identity, plus glyphs used to avoid confusion when used for footnotes. How can I expand the font set used by MP Reader installed on a PC. Also, how can I be certain that the aforementioned troublesome characters will display correctly when Reader is installed on the panoply of phones and tablets now available.