I have this in hardy too with the kicker applet. "media:/" gives
Malformed URL.
It also doesn't work for for "remote:/" or "home:/" but documents and
home are fine. The URLs work in Dolphin address bar.
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Kubuntu System Menu Malformed URL for Storage Media
https://bugs.launchpad.net/bugs/13660
I upgraded from gutsy to hardy (via a search and replace gusty to hardy
in sources.list and a dist-upgrade) and I have this problem too. It just
times out on an apt-get update.
wget also works fine to retrieve files through the http_proxy
environment variable. browsers are all working fine too.