\addLyrics cancels \pageBreak?

[Maarten Deen]

I have this snippet (in 2.10):
  \score {
      \new Staff = "Zang" {
      \set Score.skipBars = ##t

      \transpose c d { << \znAchtendertig \outlineAchtendertig >> }
      \addlyrics { << \zgAchtenendertig >> }
      \pageBreak
    }
    \header {
      piece = "Vers 38"
    }
  }
  \score {
      \new Staff = "Zang" {
      \set Score.skipBars = ##t

      << \znZevenenvijftig \outlineZevenenvijftig >>
      \pageBreak
    }
    \header {
      piece = "Vers 57"
    }
  }

When run like this, the \pageBreak from the first scoreblock is ignored. If I 
comment out the \addLyrics, the page break does appear.
I've tried fiddling with more or less {} or <<>>, but with no luck.

Is this a bug or is there a syntax that will make it work?

Regards,
Maarten