CentOS - May 2007 - solved cups error 426 was cups error 426 when accessing admin functions

Hi,
    Found a howto doc on my error 426 issue with cups. The fix was to 
disable encryption in cups 1.2.4 add

DefaultEncryption Never

    to cupsd.conf and that did it. I'd like to have encryption on the admin 
area, but for home use i'll take it.
    On another subject does anyone know if the Cups book is available as a 
pdf file?
Thanks.
Dave.