Subsonic 4.9 is out! The installation instructions page doesn’t explicitly say anything about upgrading from a previous version – fortunately, though, you don’t need to do anything different. First, grab the .deb file – currently this works:
wget http://aarnet.dl.sourceforge.net/project/subsonic/subsonic/4.9/subsonic-4.9.deb
Install:
sudo dpkg -i subsonic-4.9.deb
If you have an existing 4.8 install you will see the following:
Preparing to replace subsonic 4.8 (using subsonic-4.9.deb) …
And you’re done! Reload Subsonic in your browser window or app and enjoy the new version. To see the new features since 4.8 you can view the changelog here:
http://www.subsonic.org/pages/changelog.jsp