lilypond-book and misalignment

[debian]

NEWBIE: on debian sarge with lilypond 2.6.3.

Please,

my googling leads me to believe that there is some kind of bug in
Lilypond-book which causes it to output misaligned staves ?

I seem to be suffering from this, in that _sometimes_, only sometimes,
the first stave is far too far to the right.

Is there a fix for this or some kind of work around ?

Thanks a lot.

Joe