I'm feeling really stupid.  I have an installation of Trinity on Squeeze
where the user uses Icedove for email.  For some reason, it wants to
open PDF files in GIMP.  I see the same thing in other Gnome
applications like Evolution.

I've gone to Icedove preferences and tried to change the application
type and clicking on other . . . does not produce a dialog box to select
an application (like KPDF or acroread).  I installed kgtk-config-icedove
but that did not help.  I even installed Nautilus and tried setting the
application association there.  That at least presented KPDF as an
option in Evolution but not in Icedove.  I installed gconf-editor but
that does not seem to address application associations.

Short of finding which defaults.list file it is looking at and manually
editing it or manually setting it in mimetypes.rdf, how does one set
this in a Trinity only environment (in that Gnome desktop is not
installed)? Thanks - John