Problem turned out to be lack of http support in gvfs, which could be
fixed by manually installing the package gvfs-backends.
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Rhythmbox can't download any podcast feeds
https://bugs.launchpad.net/bugs/557113
You received this bug notification because you are a member of Ubuntu
Desktop Bugs,
thank you for your bug report, gvfs-backends is installed by default in
Ubuntu and in the rhythmbox Recommends list too, that's not a bug, you
either decided to remove it or upgraded at a time where gvfs was not
installable and validated its removal without checking the update
summary, in any case