I have updated to 11.4 RC1 from 11.3 + KDE45. It seems that I have two update applets: KPackageKit and UpdaterApplet. When I try to check for updates, both report the same error:
Download (curl) error for ‘http://download.opensuse.org/factory/repo/non-oss/content’:
Error code: Connection failed
Error message: Couldn’t resolve proxy ‘HTTP_PROXY’
However, all of the following commands work fine:
sudo curl http://download.opensuse.org/factory/repo/non-oss/content
sudo zypper install SOMETHING
and in /etc/sysconfig/proxy says PROXY_ENABLED=“no”
So I am using KDE 4 and in openSUSE 11.3, the updater is called kupdateapplet & kupdateapplet-packagekit and in openSUSE 11.4 its called kpackagekit. I am thinking you could uninstall kupdateapplet & kupdateapplet-packagekit. It is not possible to run both of these at the same time without getting an error. You may want to report an openSUSE 11.4 bug for the update that leaves the old update applet while installing the new one along side it. Its one of the reasons I just do a clean install over an update and don’t forget you need not reformat your /home area when doing a clean install if you kept it separate from the / root partition.
The error persists even if only kpackagekit is installed.
Move KDE software updates notifications to upstream infrastructure
Try removing /etc/kde4/share/config/kioslaverc. It seems to contain incorrect proxy settings by default. Restart xdm after that.