Cannot setup printer via kde wizard anymore

[Neal D. Becker]

I am using cups (and have been for some time).

I want to use the kde wizard (part of the printer dialog) to add a printer. 
It no longer works.  It asks for authorization, I give username root and
correct password, but it fails.

I don't want to use http://localhost:631 to setup the printer, because it's
useless.  I want to select an HP laserjet 8100.  For every kind of HP there
are many entries with this interface.

The kde interface used to work correctly and even recommends a good setup. 
But now it stopped working.  Here is the only clue
(/var/log/cups/error_log):

I [24/Feb/2004:14:18:28 -0500] Setting gtc28hp device-uri to
"ipp://gtc28hp/ipp" (was "file:/dev/null".)
I [24/Feb/2004:14:18:28 -0500] Saving printers.conf...
I [24/Feb/2004:14:18:28 -0500] New printer 'gtc28hp' added by 'root'.
E [24/Feb/2004:14:18:28 -0500] Bad operation "10.000)"!
E [24/Feb/2004:14:18:28 -0500] Bad request line "tpagedevice""!
E [24/Feb/2004:14:18:28 -0500] Bad request line "/Envelope Monarch: "279
540""!
E [24/Feb/2004:14:18:28 -0500] Bad request line "ex=Notcapable""!
E [24/Feb/2004:14:18:28 -0500] Bad URI "Copies=4"" in request!
E [24/Feb/2004:14:18:28 -0500] Bad request line ": "%%
FoomaticRIPOptionSetting: Copies=41""!
E [24/Feb/2004:14:18:28 -0500] Bad request line "Copies=77""!
E [24/Feb/2004:14:18:28 -0500] Bad request line "rderDependency: 100
AnySetup *TonerDensity"!
E [24/Feb/2004:14:18:28 -0500] Bad URI "Miscellaneous" in request!
E [24/Feb/2004:14:18:28 -0500] Bad request line "man: Standard "(001.007S)"
Standard ROM"!