Description of problem:

When you click on

http://rlx-1-12.rhndev.redhat.com/network/software/channels/manage/errata/clone.pxt?cid=162

and then on Add, you get 500 Error - Internal Server Error.

Version-Release number of selected component (if applicable):

RHN Satellite 5.0.0.

How reproducible:

Seemed deterministic for me but for the best results, restart the httpd before
trying, as the use Sniglets::Lists could be done by some other code.

Steps to Reproduce:
1. Restart httpd.
2. Go to the URL above.
3. Click add.
  
Actual results:

500 Error - Internal Server Error and a traceback

The following exception occured while executing this request:
 GET
/network/software/channels/manage/errata/add.pxt?manage_channel_navi_node=add_channel_errata&cid=162
HTTP/1.1 (from browser)
 /network/software/channels/manage/errata/add.pxt (from Apache)

Date:
  Thu Aug  9 17:42:25 2007

Headers:
  Accept:
text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
  Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
  Accept-Encoding: gzip,deflate
  Accept-Language: en-us,en;q=0.5
  Connection: keep-alive
  Cookie: s_vi=[CS]v1|4635FA9500003C6F-A160B61000017FA[CE]; s_cc=true;
s_sq=%5B%5BB%5D%5D; rh_user=cperry94|Clifford|customer|;
pxt-session-cookie=138x513393327303a2050545469b304270fc
  Host: rlx-1-12.rhndev.redhat.com
  Keep-Alive: 300
  Referer:
http://rlx-1-12.rhndev.redhat.com/network/software/channels/manage/errata/clone.pxt?cid=162
  User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.10)
Gecko/20070221 Red Hat/1.5.0.10-0.1.el4 Firefox/1.5.0.10

Form variables:
  cid => 162
  manage_channel_navi_node => 

User Information:
  User admin (id 1, org_id 1)

Error notes:
  (none)

Initial Request:
  Yes

Error message:
  Can't locate object method "navi_empty_set" via package "Sniglets::Lists"
(perhaps you forgot to load "Sniglets::Lists"?) at
/usr/lib/perl5/site_perl/5.8.5/Sniglets/Navi/Node.pm line 70.

Expected results:

No error.

Additional info: