uneven bars in alternate repeats

[John Rehwinkel]

If I have an alternative with a note sticking out above the staff,
LilyPond moves the marker for that  alternative up to avoid collision
(as it should).  However, it doesn't move the marker for other alternatives, 
which gives an uneven look.

\version "2.10.33"
\paper{ ragged-right=##t }

\relative c'' {
        \repeat volta 2 { e1 }
        \alternative { { e } { e' } }
}