Did solve the problem for me: In gconf-editor the key /system/http_proxy/use_http_proxy was set even if I haven't specified any proxy since I don't use one.
Since I never changed this setting directly I assume there is a bug in gnome-control-center, though, where I once had tried to set up my system for a proxy and later to revert that setting.
Did solve the problem for me: In gconf-editor the key /system/ http_proxy/ use_http_ proxy was set even if I haven't specified any proxy since I don't use one. center, though, where I once had tried to set up my system for a proxy and later to revert that setting.
Since I never changed this setting directly I assume there is a bug in gnome-control-