CUPS web interface reports "Destination printer does not exist!", and cannot print test pages to remote printer. But other applications such as xpdf print flawlessly with 'lpr' command. Here's my system config: net-print/cups-1.1.23-r7 +gnutls +nls +pam +samba +slp +ssl Device URI: http://server:631/ipp/
http://forums.gentoo.org/viewtopic.php?p=3188038#3188038 Solved. I think this should be considered as a bug, though. This is very misleading.
Ask upstream to improve their examples, not a Gentoo issue.