partcombine with rests

[Rick Kimpel]

I saw a bug similar to this but it's not exactly the same.  
I'm using Lilypond 2.8.1 on WinXP.

When using \partcombine where the lower part has whole rests (either R1 or r1)
in the same measure that the upper part has a half rest followed by a note, the
whole rest is printed and the half rest is not.  The whole rest is followed by
the notes that would normally follow the half rest.  

If the upper voice has the whole rest, the combined part behaves as expected.  I
tried the workaround somebody mentioned of splitting up the R1*4 into R1 R R R.
 it still has the problem.

I tried posting the lilypond sample code, but it thinks i'm top-posting and
won't let me send.  (which is odd because i see many people top-post, so it's
clearly not taboo here)