update-manager doesn't show the upgrade release button

Thanks for your bugreport.

Are you behind a proxy or some other network restriction? Could you please open a terminal and run:
$ wget --debug -O- http://changelogs.ubuntu.com/meta-release|tail
and attach the terminal output to this bugreport?

Thanks,
 Michael

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

Thanks for the output.

Could you please try to remove (or move away) /etc/apt/apt.conf.d/01proxy and see if that fixes the issue? I will add code in u-m to do better checking for the proxy, I suspect this is causing the problem.

I was able to reproduce the problem and I improved the proxy check now to ignore a empty line like this.

That worked -- I tried the work around (mv 01proxy out of apt.conf.d folder)

Thanks for the quick turn around! you guys are awesome!!

This bug was fixed in the package update-manager - 1:0.131

---------------
update-manager (1:0.131) lucid; urgency=low

  * UpdateManager/UpdateManager.py:
    - do not crash if setlocale() fails (LP: #471378)
  * UpdateManager/Core/DistUpgradeFetcherCore.py:
    - add missing "logging" import (LP: #475941)
  * DistUpgrade/DistUpgradeController.py:
    - better message for upgrades over ssh (LP: #463257)
  * UpdateManager/Core/utils.py:
    - improve proxy check and show error if proxy settings
      look invalid (LP: #472168)
  * AutoUpgradeTester/profile/*/DistUpgrade.cfg:
    - updated to test karimic -> lucid and hardy -> lucid
  * Janitor/plugins/deb_plugin.py:
    - use apt.progress.InstallProgress() to keep the computer-janitor
      UI responsive
  * AutoUpgradeTester/install_blacklist.cfg:
    - add ec2 to the blacklist for the kvm based testing
  * UpdateManager/UpdateManager.py:
    - show selected and download size in two rows (LP: #434062)
  * data/do-release-upgrade.8:
    - man page added, thanks to Willem Bogaerts
  * DistUpgrade/DistUpgrade.cfg:
    - add laptop-mode-tools to the forced obsoletes on upgrade (thanks to
      Steve Langasek)
  * UpdateManager/UpdateManager.py:
    - show restart required dialog in u-m when the upgrade is finished
      with proper parent
  * AutoUpgradeTester/post_upgrade_tests:
    - add python import, xorg and kernel tests
  * UpdateManager/dialog_release_notes.ui:
    - merged lp:~freinhard/update-manager/ui-fix (many thanks)
  * UpdateManager/Core/MetaRelease.py:
    - merge lp:~cristiklein/update-manager/use-xdg (many thanks)
 -- Michael Vogt <email address hidden> Tue, 01 Dec 2009 21:23:59 +0100