I am not behind a proxy or any network restriction.  at one point, I had tried 
to setup the apt-cache package but failed.  I reverted my 
/etc/apt/apt.conf.d/01proxy file so that it wouldn't try to use the proxy 
anymore.
Acquire::http::Proxy "http://";;

my http_proxy env var is empty.


here is the output you asked for:
$ wget --debug -O- http://changelogs.ubuntu.com/meta-release|tailSetting 
--output-document (outputdocument) to -
DEBUG output created by Wget 1.11.4 on linux-gnu.

--2009-11-03 08:24:29--  http://changelogs.ubuntu.com/meta-release
Resolving changelogs.ubuntu.com... 91.189.90.132
Caching changelogs.ubuntu.com => 91.189.90.132
Connecting to changelogs.ubuntu.com|91.189.90.132|:80... connected.
Created socket 3.
Releasing 0x0000000000b63080 (new refcount 1).

---request begin---
GET /meta-release HTTP/1.0
User-Agent: Wget/1.11.4
Accept: */*
Host: changelogs.ubuntu.com
Connection: Keep-Alive

---request end---
HTTP request sent, awaiting response... 
---response begin---
HTTP/1.1 200 OK
Date: Tue, 03 Nov 2009 13:24:30 GMT
Server: Apache/2.0.55 (Ubuntu) mod_python/3.1.4 Python/2.4.3
Last-Modified: Mon, 02 Nov 2009 09:57:59 GMT
ETag: "29401e-138d-699857c0"
Accept-Ranges: bytes
Content-Length: 5005
Cache-Control: max-age=7200
Expires: Tue, 03 Nov 2009 15:24:30 GMT
Keep-Alive: timeout=15, max=100
Connection: Keep-Alive
Content-Type: text/plain; charset=UTF-8

---response end---
200 OK
Registered socket 3 for persistent reuse.
Length: 5005 (4.9K) [text/plain]
Saving to: `STDOUT'

100%[======================================>] 5,005       --.-K/s   in
0.09s

2009-11-03 08:24:30 (52.1 KB/s) - `-' saved [5005/5005]

Dist: karmic
Name: Karmic Koala
Version: 9.10
Date: Thu, 29 Oct 2009 12:00:00 UTC
Supported: 1
Description: This is the 9.10 release
Release-File: http://archive.ubuntu.com/ubuntu/dists/karmic/Release
ReleaseNotes: 
http://archive.ubuntu.com/ubuntu/dists/karmic-updates/main/dist-upgrader-all/current/ReleaseAnnouncement
UpgradeTool: 
http://archive.ubuntu.com/ubuntu/dists/karmic-updates/main/dist-upgrader-all/current/karmic.tar.gz
UpgradeToolSignature: 
http://archive.ubuntu.com/ubuntu/dists/karmic-updates/main/dist-upgrader-all/current/karmic.tar.gz.gpg

-- 
update-manager doesn't show the upgrade release button
https://bugs.launchpad.net/bugs/472168
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