Cannot install on ubuntu 14.04

[ShockwaveNN]

Hello

I try to install `ttf-mscorefonts-installer` package, which depends of your `update-notifier-common` package on ubuntu 14.04 and it failed cause
```
update-notifier-common : Depends: update-manager-core (>= 1:0.196.23) but it is not going to be installed
```

I reproduce a problem with minimal Dockerfile

```
FROM ubuntu:14.04
RUN apt-get -y update && apt-get install -y update-notifier-common
```

Seems this error start to happened yesterday

[Florin Baca (fbaca)]

Hello,

We have also started to see the same issue starting today. We have network automated installs which are installing Ubuntu and these are now failing.

The issue is related to update-manager-core, version 1:0.196.23 is trying to be installed but only 1:0.196.11 is provided. Initially I suspected it could be due to the squid-deb-proxy we are using so I removed the complete cache but this didn't solve the issue. Also changed the links of the repositories, same issue.

On the system to be installed I can only see 1:0.196.11 when running apt-cache showpkg. On systems I have running for a longer time showpkg shows the 1:0.196.23 version:

---------------------------------------------------------
root@aaa:~# apt-cache showpkg update-manager-core
Package: update-manager-core
Versions:
1:0.196.23 (/var/lib/dpkg/status)
 Description Language:
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_trusty_main_binary-amd64_Packages
                  MD5: 0a19dc54e8c67de7adf0ecfe839b541f
 Description Language: en
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_trusty_main_i18n_Translation-en
                  MD5: 0a19dc54e8c67de7adf0ecfe839b541f

1:0.196.11 (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_trusty_main_binary-amd64_Packages)
 Description Language:
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_trusty_main_binary-amd64_Packages
                  MD5: 0a19dc54e8c67de7adf0ecfe839b541f
 Description Language: en
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_trusty_main_i18n_Translation-en
                  MD5: 0a19dc54e8c67de7adf0ecfe839b541f

---------------------------------------------------------

However, if I try to download this doesn't work:

------------------------------------
root@aaa:~# apt-get download update-manager-core
E: Can't find a source to download version '1:0.196.23' of 'update-manager-core:amd64'
------------------------------------

This works:

------------------------------------
root@aaa:~# apt-get download update-manager-core=1:0.196.11
Get:1 http://de.archive.ubuntu.com/ubuntu/ trusty/main update-manager-core all 1:0.196.11 [5,278 B]
Fetched 5,278 B in 0s (66.2 kB/s)
-------------------------------------

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Florin Baca (fbaca)]

This seems to have been fixed. We've done another network install yesterday and it went fine, I could see 1:0.196.23 is now available in the repos.

[ShockwaveNN (shockwavenn)]

Yeah. My Dockerfile works fine now, seems fixed for me.

[Launchpad Janitor (janitor)]

[Expired for update-notifier (Ubuntu) because there has been no activity for 60 days.]