> I've noticed at times lilypond produces notes that are not exactly on or > between the staff lines. I boiled it down to the attached minimum > example, which shows a D flat that looks floated up about half way to E > flat. However, if you comment out the header subtitle, the note lands > precisely on D flat.
Please show a zoomed-in image (PNG) of what you get. For me, your attached PDF looks just fine with my PDF viewer on a GNU/Linux box. Werner