Problems with cups printing with 2.8..

[John Affleck <lists+gnome-print lists oddment net>]

(apologies if this is the third time you've heard me whining about
this, but I'm getting desperate)

I just finished installing 2.8 from garnome on a much-abused redhat
7.1 system.  I'd done the same for 2.6 (also from garnome). 
Everything works find, except I can't print from anything that uses
libgnomeprint (gedit, evolution, gnumeric), all of which used to work
fine under 2.6.  I'm trying to print to a CUPS print server, so I
installed libgnomecups and gnome-cups-manager, and gnome-cups-manager
sees all of the available printers just fine.  But they don't show up
in the print dialog box.  Nor can I select CUPS as a location (which,
I guess isn't terribly surprising).  I can see all of the printers
listed in /etc/printcap, but attempting to print to them produces an
"lpr:  unable to print file:  client-error-not-found" error message
and no output.  When I move the libgnomeprintlpd modules aside, I
don't get any printers, other than the PDF and generic postscript
drivers.

This is with libgnomeprint-2.8.0, libgnomeprintui-2.8.0,
libgnomecups-0.1.12, gnome-cups-manager-0.25 build against CUPS
1.1.21.

As a final twist, I don't have, and can't get, root access to the
machine in question, although the identical thing happens on a machine
I do have access to.

CUPS seems to be working fine.  lpstat lists all of the printers, and
I can lpr to my hearts content. 

Is there an easy solution to make the CUPS printers work under gnome ? 
Did I screw something obvious up ?

	Thanks,

	John A.