PDF bitmap problem

[Tim Walters]

First of all, let me say how much I love Lilypond. I downloaded it a 
couple of days ago and immediately fell in love. Every other notation 
program I've tried has made me rip my hair out and go back to pencil 
and paper.

I do have a couple of questions, though...

When I run "lilypond", the resulting PDFs are fine. But when I run 
lilypond-book, even with the minimum LaTeX file, e.g.:

\documentclass{article}

\begin{document}
        \lilypondfile{foo.ly}
\end{document}

the music in the resulting PDF file is bit-mapped instead of properly 
rendered on screen. See, e.g., http://www.doubtfulpalace.com/uncfoo.pdf 
and zoom in on a note-head.

If I print the PDF, the notes look fine, at least to the resolution of 
my ink-jet printer. And any text added in the LaTeX file is fine 
on-screen. It's just the lilypond elements that have the problem. Is 
there some specific way I need to configure LaTex, dvips, or ps2pdf? 
I'm running the Fink lilypond package on OS 10.2.8.

What's weird is that I could swear this wasn't happening yesterday, 
before a power outage. But that would be very strange, and 
unfortunately I overwrote the PDF I made yesterday.

I'll ask my lilypond language questions in a separate e-mail.