partcombine brokenness

[Erik Sandberg]

hi!

I've been able to isolate the partcombine brokenness. Here's a score 
demonstrating it:

\score {
 \new Staff \notes {a1*8 \partcombine \X \Y}
 }
 \paper{}
}

Insert just about any music as \X and \Y. All decisions about how to arrange 
the voices will be offset by 8 bars; thus strange things will happen.

i.e. when \partcombine splits up the music into voices & chords, it does it 
from the beginning of the staff, not from the beginning of its argument.

Erik