[Dvipng] disappearing branches with qtree

[Jürgen Spitzmüller]

Hello,

this is an issue that was raised on LyX bugzilla, please cf.
http://bugzilla.lyx.org/show_bug.cgi?id=3704

It appears that branches of trees drawn with the LaTeX package qtree vanish in 
the dvipng process. I've attached a tarball with the tex, dvi and png file 
and the log produced by LyX's preview-latex implementation. This is with 
dvipng 1.9.

Is this a dvipng issue? Is there something we can do on the LyX side?

Thanks,
Jürgen

lyxpreview.tar.gz
Description: application/tgz