LyricExtender extends too far in some verses

[Jonathan Kulp]

One of my songs has four verses of text for most of the song, but for 
the last part there's only one line of text.  My problem is that the 
LyricExtenders are sticking way too far out at the end of the three 
verses that do not keep going.  This looks similar to issue 331 but as 
far as I can tell there was no resolution to the problem:

http://code.google.com/p/lilypond/issues/detail?id=331

Can anyone tell me how to make the Lyric extenders stop at the right 
place?

Minimal example code and image attached.  Thanks,

Jon
--
Jonathan Kulp
http://www.jonathankulp.com

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\version "2.11.64"

voiceNotes = \relative c'' {
  \time 3/4
  d16( c) b8 ~ b2
  r4 f'4.^\mf\<      e8
}

verseOne =  \lyricmode { tar -- de. __ ¡Ay, Mo }

verseTwo = \lyricmode { tar -- es. __ }

verseThree = \lyricmode { ai -- re __ }

verseFour = \lyricmode { gran -- des. __ }

\score {
  \new Staff = "voice" <<
        \context Voice = "voice" { \voiceNotes }
        \new Lyrics \lyricsto "voice" { \verseOne }
        \new Lyrics \lyricsto "voice" { \verseTwo }
        \new Lyrics \lyricsto "voice" { \verseThree }
        \new Lyrics \lyricsto "voice" { \verseFour }
  >>
}

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lyric-prob-minimal.png
Description: PNG image