trouble with alternatives in repeats

[C.Flothow]

Can anyone explain (and possibly help with) the following behavior of 
repeat with alternatives:

If I use the snippet as it stands everything looks fine.
But if I add the original appoggiaturas then everything goes to pieces.
Even one such spells trouble.

Thanks
Chris


\version "2.12.2"

staffCello = \new Staff 
        {\time 3/8
        \clef G 
        \relative c' {  
            \repeat volta 2{
            d4.}
                \alternative{
                        {%\appoggiatura d         % the appoggiatura spells 
trouble
                         c4 r8|}
                        {%\appoggiatura d        % both appoggiaturas together: 
more trouble
                        e4 r8|}     
                } 
                \repeat volta 2{
                r8}                                                 
                    
        }

}
staffBass = \new Staff 
       {\time 3/8
        \clef bass
        \relative c { 
            \repeat volta 2
               {
               f8 g4|}
               \alternative {
                       {c,8 g'16 f e d|}
               {c,4 r8|}}
            \repeat volta 2     
            {g'8
            }               
        }
       }          

\score {<<
                \staffCello
                \staffBass
        >>
}

\paper {}