Opera v9.52 not listed in Ubuntu Synaptic Package Manager

Can anyone tell me how to get Ubuntu 8.04's Synaptic Package Manager
to list Opera v9.52? It currently lists v.9.27 under Third-Party Software
in the category "World Wide Web (partner)", and there seems to be some
kind of disagreement between Synaptic Package Manager and Opera
about what the current name of the release repository is.

*TimDaniels*

"Timothy Daniels" wrote:
> Can anyone tell me how to get Ubuntu 8.04's Synaptic Package Manager
> to list Opera v9.52? It currently lists v.9.27 under Third-Party Software
> in the category "World Wide Web (partner)", and there seems to be some
> kind of disagreement between Synaptic Package Manager and Opera
> about what the current name of the release repository is.
>
> *TimDaniels*

I added "deb http://deb.opera.com/opera/ lenny non-free" to the file
"etc/apt/sources.list", and now I see in Synaptic Package Manager's
"World Wide Web (non free)" category,

Opera 9.50-20080422.6 Opera browser
Opera-static 9.50-20080422.1 Opera browser

How can I get v9.52 in there?

*TimDaniels*