Hideous font when printing text file

[Henk Koster <H.A.J.Koster@xs4all.nl>]

Running mixed testing/Sid, and after a recent upgrade any text file 
(like a directory listing) gets printed on my CUPS printer with a 
hideously stretched and enlarged (Courier) font, far removed from the 
default 10 chars/inch and 6 lines/inch. Other file types, like PDF-files 
produced with pdflatex or websites, print fine. My printer is an HP 
DeskJet 6940, configured as AppSocket/HP JetDirect device in CUPS.

I've tried different mono-spaced fonts in Gnome - System - Preferences - 
Appearance and I have varied the dpi, all to no avail. Fonts look fine 
on screen, but when text is printed (with lp or lpr) the problem appears.

Any ideas on how to fix this?

--
Henk Koster
"Behavioral axioms are right, but agents make mistakes."
Attributed to L.J. Savage