Percussion madness.

[Ralph Little]

Hi,
Anybody know what's wrong with this?
Lilypond 2.2.2 on Linux.

Percussion staff seems to split into notes-type Voices for the
multi-drumvoice stuff.
This is the smallest I can get it, but I can't figure out what's going
on.
Seems to be something to do with the r1, which I have some markup
attached to, otherwise I would
use R1 (or rather R1*2):

--------8<--------8<--------8<--------8<--------8<--------8<-----
\include "english.ly"
\score {
        \drums {
                \new DrumStaff <<
                        \context DrumVoice = "1" { s1*2}
                        \context DrumVoice = "2" { s1*2}
                        {
                                R1
                                r1
                                r4 r8 sidestick16 ss ss8 ss4
                                <<
                                        {hihat8 ~
                                        hh8 hh hh hh ~
                                        hh hh hh hh}
                                        \\
                                        {ss8 bd4. bd8 ss4 r8 bd8}
                                >>
                        }
                >>
        }
}

--------8<--------8<--------8<--------8<--------8<--------8<-----

Any help would be muchly appreciated...

Regards,
Ralph

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