Grace notes with paper11

[Erik Sandberg]

Hi,

When using paper11, it does not seem to be possible to use grace notes. I 
guess this is quite understandable since it would require an even smaller 
font. But should there not be a warning in the documentation about this?

Also, the error messages from this are a bit too cryptic IMHO, and include a 
few "programming error" messages (which, if I got it right, are not supposed 
to occur in a BugFree program).

Thanks for a great program. It's great to feel that the only bugs I can find 
are as irrelevant as these :-)

Example:

\version "1.6.0"
\include "paper11.ly"
\score {
 \notes \relative c'' {
   \context Voice \grace c8 c
 }
 \paper {}
}


ly2dvi output:

Running LilyPond...
GNU LilyPond 1.6.0
Now processing: `score.ly'
Parsing...
Interpreting music...[1]
Preprocessing elements... warning: couldn't find any font satisfying 
(#f upright medium music -2)warning: Symbol not found, 

/tmp/score.ly:7:26: warning: Programming error: Infinity or NaN encountered:
   \context Voice \grace c
                          8 c

Calculating column positions... 
/tmp/score.ly:7:26: warning: Programming error: Infinity or NaN encountered:
   \context Voice \grace c
                          8 c
warning: couldn't find any font satisfying 
(#f upright medium music -2)programming error: Adding reverse spring! Setting 
to unit spring (Continuing; cross thumbs)
[2]
paper output to `score.tex'...
programming error: Infinity or NaN encountered while converting Real number; 
setting to zero. (Continuing; cross thumbs)

Analyzing score.tex...
Running LaTeX...
DVI output to `score.dvi'...

Thanks,
Erik