Starting Grace Notes error: bug?

[Javier Ruiz]

> I'm not top posting.
%{
Starting a piece with grace notes on one staff, or the beginning of a 
\repeat volta block, will cause undesired formatting (adds extra clef,
extra set of time signagures, key is offset)
plus .midi timing errors.
Adding parallel silent grace note(s) of same duration to the another staff 
works to correct the PDF output, but won't resolve the midi timing errors.
-Javier Ruiz
%}
\version "2.13.33"
General = {\key g \major \time 3/4}
\score{ 
  \new PianoStaff <<
            \new Staff = "upper"
                 \relative c'{
                         \General
                         \clef treble
                         \grace {fis16[ a]} a2.}
            \new Staff = "lower"
                \relative c{
                        \General
                        \clef bass
                        %\grace s8  %uncomment line to fix PDF but not MIDI
                                <d fis a>2.}
 >>
  \layout {}
  \midi {}
}
%EOF