Verifying/fixing a failed (?) upgrade to 13.04

[Colin Law]

On 14 May 2013 10:28, Adam Funk <a24061 at ducksburg.com> wrote:
> Yesterday I upgraded a machine from 12.10 to 13.04 using the GUI from
> the update-manager.  Something mysteriously died towards the end (I
> got some /var/crash/_whatever) & I can't figure out how to tell if the
> upgrade worked or not.  When I log into the machine it shows this:
>
>
> Welcome to Ubuntu 13.04 (GNU/Linux 3.8.0-19-generic i686)
> ...
>   Graph this data and manage this system at https://landscape.canonical.com/
>
> New release '13.04' available.
> Run 'do-release-upgrade' to upgrade to it.
>
>
> But do-release upgrade does nothing:
>
>
> /home/adam $ sudo do-release-upgrade
> [sudo] password for adam:
> Checking for a new Ubuntu release
> No new release found
>
>
> and aptitude update && aptitude safe-upgrade do nothing either.  I've
> checked that all the entries in /etc/apt/sources.list and
> sources.d/*.list have "raring".
>
> How do I verify that my system is upgraded?
> If it is, how do I fix the "New release" message?

Does
sudo apt-get update && sudo apt-get dist-upgrade
achieve anything or produce any errors?

Colin