[Scribus] PDF/X-3 tab disabled?

[Laurent Cocea]

Hi all-

In the Scribus version I have (scribus-1.1.3-0.fdr.2.rh90.i386.rpm;
lcms-1.11-0.fdr.3.rh90.i386.rpm; qt-3.1.2-0.9x.2.i386.rpm; on RH 9+,
Gnome 2 Desktop), the PDF/X-3 tab in the `Export to PDF' dialog is
grayed out (disabled). I wonder if there is some other feature I need to
enable first for this to work, or is this "by design" in the
RedHat/Fedora build I got. I seached the last six archives and could not
find an answer to my question. Any help would be greatly appreciated.

--Laurent