FC6: can't print to USB HP printer

[Dave Mitchell <davem iabyn com>]

I have a USB-based HP printer (HP PSC 2355) that worked fine under FC5,
but refuses to print under FC6.

The system-config-printer tool auto-configured this as:

    Description: Added by HAL
    Location:
    Device URI: hal:///org/freedesktop/Hal/devices/usb_device_3f0_4911_HU4AFBR2HZKJ_if1_printer_HU4AFBR2HZKJ
    make and model: HP PSC 2350 Foomatic/hpijs (recommended)


But doing a simple 'lpr /etc/rpc' from the command gives, in
/var/log/cups/error_log,


E [31/Oct/2006:22:42:33 +0000] [Job 7] Unable to open HAL device "hal:///org/freedesktop/Hal/devices/usb_device_3f0_4911_HU4AFBR2HZKJ_if1_printer_HU4AFBR2HZKJ"
E [31/Oct/2006:22:42:33 +0000] PID 4183 (/usr/lib/cups/backend/hal) stopped with status 1!

Any ideas?

-- 
There's a traditional definition of a shyster: a lawyer who, when the law
is against him, pounds on the facts; when the facts are against him,
pounds on the law; and when both the facts and the law are against him,
pounds on the table.
    -- Eben Moglen referring to SCO