Just got the PDF/mobi/ePub bundle. I'm not expecting art really, but the .mobi file is missing a lot of special characters for the classes and so on. the file shows the empty square for 'missing characters' when there's a different font or whatnot.
Is it an issue with the .mobi file itself (ie, the characters aren't embedded) or with the Kindle app's ability to deal with the special characters? If it's a problem with the .mobi, that would need to be fixed on your end, of course, but with the Kindle, I'd think they would need to be contacted to make their app work better with their own format.
Either way, having the document render properly would be great.