On Wed, 2011-09-07 at 13:50 +0200, lee wrote:
> 
> One of our users has this problem. He updated his laptop to 
> sl-release-6.1-2.x86_64 .
> 
> Now cups cant find the printers on our network. SL 6.0 with :
> 
> cups-1.4.2-35.el6_0.1.x86_64
> 
> works fine. 

Instead of using system-config-printers, try using the web interface at
localhost:631.

Also, you usually need to be root to set up the printer, unless the user
is part of the printer group.