(I have installed "kdebase" before). This command seems not to supply a job title but only a printer name. Then the kprinter dialog pops up and I choose the actual printer there. Then I click "Print" and this way both the LaserJet 4050 and the LaserJet 1022 print. So this seems to prove that really the job title breaks the processing bya CUPS.
If I choose "default" as the printer in Firefox and then click options I can choose a print command. I have chosen
kprinter ${MOZ_PRINTER_ NAME:+' -P'}${MOZ_ PRINTER_ NAME}
(I have installed "kdebase" before). This command seems not to supply a job title but only a printer name. Then the kprinter dialog pops up and I choose the actual printer there. Then I click "Print" and this way both the LaserJet 4050 and the LaserJet 1022 print. So this seems to prove that really the job title breaks the processing bya CUPS.