Starting music with grace note problems

[Michael Lakes]

Hi,

I posted this in the bugs, but it seems users list is more active and I'm 
currently looking for a workaround :)

The piece of lilypond code I have below contain two bugs.  When the guitar 
starts with a grace note, the instrument name "Piano" will not be printed.  
Also the bass clef for the piano will be change to a treble clef then follow 
by a bass clef.  If you remove the grace note, the output will look as 
expected.

I was able to find a workaround for the latter problem (seems to be a bug 
from old versions of lilypond but was never fixed), but is there any way to 
get the instrument name to print?  In regard to grace notes, is possible to 
put a line through the flag like the acciaccatura or some way to adjust the 
slur of the acciaccatura?

Thanks

Michael

P.S. I also find some other weird problems with grace/acciaccatura notes but 
that's probably for another post :-)

%============================
gtr = \notes {
        \set Staff.instrument = "Guitar"
        \grace g16 a1
        }


pno = \new PianoStaff <<
        \set PianoStaff.instrument = "Piano"
        \new Staff { \notes {b1}}
        \new Staff { \notes {\clef bass c1}}
> >

\score {
 <<
     \gtr
     \pno
 >>
}

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