I'm using Ubuntu 12.10 with Rhythmbox 2.97.
I have an RSS podcast feed that uses HTTP Auth.
Adding this URL to Rhythmbox podcast library results in a generic 'Unable to load the feed. Check your network connection' error. Adding a non-authenticated feeds works as expected.
How can I authenticate this feed in Rhythmbox? Alternatively, what would be a good podcast app (preferably GTK-based) that support authenticated feeds?