Comment 16 for bug 448810

Right. Update-manager now uses the synaptic backend again since we don't think that aptdaemon can provide the same stability now. But as it will improve things may change in the next release of Ubuntu.

The policy change was intended since it is now possible to set the HttpProxy for a cache update. This would result in a leak of usernames and passwords in the sources url, e.g. "deb http://joe:<email address hidden>/ubuntu karmic main".