DOCBOOK-APPS: disappearing header

Hi,

Just noticed a strange behavior of postscript output by jadetex and
dvips.
If you take the resulting .ps and then convert it to PDF, the header
(typically the name of the chapter) is cut.
Even performing a ps2ps conversion ("ps2ps  uses  gs(1)  to convert
PostScript(tm) file "input.ps" to simpler and (usually) faster
PostScript in "output.ps"") I get the same result!

Any idea?

Thanks, Camille.