Using aptitude is supposed to be the easiest thing in the world.
Today, I tried to upgrade my Squeeze installation into Wheezy with several issues.
Please visit the Logitechmediaserver Download page to learn about the latest stable version of Logitechmediaserver.
This server is a dedicated Intel(R) with an i7 CPU 950 @ 3.07GHz and 24 GB of RAM for which I pay just 34 EUR/month, VAT included.
It all went great with that upgrade, and I had no issues with the OS ever since - this is the reason that made me confident that the upgrade from Wheezy to Jessie is smooth and easy.
The hardware is a dedicated server hosted on Hetzner.
Even if the Header form the link above says Beta not all Versions are beta builds. [7.9] is the latest Version supplied by the community. The pre-release versions of the files are also available.
To install the latest stable release please do the following tasks: The deb repository is gone see  Open Settings on your Logitechmediaserver Webgui (its in the lower right bottom) Klick on the Tab Advanced on the Top and select Software Updates on the drop down menue in the left.