Font error with angle brackets for harmonics in tablature

[Carl Sorensen]

When trying to display harmonics in tablatures, I get a font error:

Preprocessing graphical objects...
warning: no PostScript font name for font
`/usr/X11R6/lib/X11/fonts/100dpi/timR24.pcf.gz'
warning: FreeType face has no PostScript font name
warning: no PostScript font name for font
`/usr/X11R6/lib/X11/fonts/100dpi/timR24.pcf.gz'
warning: FreeType face has no PostScript font name
Solving 1 page-breaking chunks...[1: 1 pages]
Drawing systems...
Layout output to `tablature-harmonic.ps'...
warning: Found infinity or nan in output. Substituting 0.0
warning: Found infinity or nan in output. Substituting 0.0
warning: Found infinity or nan in output. Substituting 0.0
warning: Found infinity or nan in output. Substituting 0.0
warning: Found infinity or nan in output. Substituting 0.0
warning: Found infinity or nan in output. Substituting 0.0
warning: Found infinity or nan in output. Substituting 0.0
warning: Found infinity or nan in output. Substituting 0.0
Converting to `./tablature-harmonic.pdf'...



Any clues on how to solve this?

LilyPond 2.13.12 on OSX 10.5.8; self-compiled.

Thanks,

Carl