Why is the Liferea package in Ubuntu always so behind the latest official stable version?

Last.fm player’s Debian/Ubuntu package

Just in case you haven’t noticed, there’s a .deb package in the download section of Last.fm.

This is another reason why I prefer Last.fm over Pandora.

Update: Alberto Garcia has more packages in his webpage for Debian sarge, Debian etch, Ubuntu dapper and Ubuntu edgy for x86 systems. Thanks!