Dear Günter and other LyX users, Again thank you for the advice to check last week's and earlier discussions. While reading through the old emails, I was able to resolve the problem. To solve it, I went to Tools->Preferences->LaTeX and changed the TeX encoding to a null value (blank). I saw where others had success in setting it to "default", but that didn't work for me. I also had to change the underlying document class to load its defaults from the scrbook document class instead of from book. The only font that I could get to reliably work with book was computer modern (which fails to impress when seen on screen, I thought the printed output was fine).
The only explanation that I could come up with for my problem was that the Open Type font I was given isn't compatible with a T1 font encoding. I tried to create a font definition and proper LaTeX package for it, but finally got frustrated and just gave up. As I mentioned in my last email, it has been s a very frustrating two days. Whenever I have this much trouble with a piece of technology, I like to create a brief write up of the things that I learned. It gives me a reference to go back to in the future. Topics I'd like to include are a discussion of the LaTeX fonts, TeX encoding, and what LyX does by default. Is anyone aware of a resource (wiki, book chapter, webpage, or blog) that discusses the fontenc and fontspec packages in detail? I think that my issue is fairly specific to xetex, so that mailing list may be a better place to ask. As I'm researching this, is there anything else that I should keep in mind? Cheers, Rob