bug with acciaccatura and piano staff

[J. Scott Amort]

Hi,

Try the following ly file:

\paper { raggedright = ##t}

globalsettings = {
        \time 3/4
        \key c \minor
}

\score {
        \context PianoStaff \relative c' <<
                \context Staff = upper {
                        \globalsettings
                        \clef treble
                        \acciaccatura b8
                        <ees g c>2.
                }
                \context Staff = lower {
                        \globalsettings
                        \clef bass
                        <c c,>2.
                }
        >>
}

It produces very strange output - an extra clef, time and key signature
for both staves (one set before and one set after the acciaccatura).
Removing the acciaccatura fixes the problem.  This occurs with grace
notes as well, and using the GrandStaff instead of the PianoStaff.

Best,
Scott