apt-get not working properly?

[Tom Curran <narrucmot@gmail.com>]

I regularly run "apt-get update" and "apt-get upgrade" once a week or so 
to keep the installed packages on my slug up to date.  For the past few 
weeks, however, apt-get hasn't responded with an packages that need 
updating.  This is quite strange to me because it always used to find at 
least a few packages every week.  It appears to check 
security.debian.org and mirrors.kernel.org for etch updates, etc.  The 
slug is running the 2.6.18-4-ixp4xx kernel and version 0.6.46.4-0.1 of 
apt.  The behavior seems to have started after I installed the 
2.6.18-4-ixp4xx kernel on March 27th.  Any ideas on what the problem, if 
any, might be?  How do I fix this?

--Tom