non-root KDE user can not access CUPS server?

[RParr <RParr@TemporalArts.COM>]

Since updating my etch system a couple weeks ago (and a couple times 
since) regular KDE users have been unable to print using KDE printing 
(ie kprinter) to access CUPS printers.

I get error
----------------------------------------
An error occurred while retrieving the printer list:
Connection to CUPS server failed. Check that the CUPS server is 
correctly installed and running. Error: localhost: read failed (15).
----------------------------------------

Regular users CAN access CUPS via the browser (localhost:630) and 
through non-KDE apps (Gimp, Mozilla, ...)

Root CAN access CUPS from KDE/kprinter apps fine.

Is this a known problem?

Is there a work-around and/or fix?

Thanks
R.Parr, RHCE, Temporal Arts