Comment 8 for bug 545134

It's really annoying that proxy settings are not honored properly across ubuntu software center, package manager and firefox. One would expect that by setting proxy in the system preferences and hitting "apply system wide", that's what would happen. In a business context this small annoyance is going to make ubuntu appear as a "toy" OS, unsuitable for business use.
Also, this bug has hit me since 9.04 (didn't use Ubuntu at $work before). It's about time devs wake up and fix this!

Just so I'm not misunderstood: I love Ubuntu, actually I'm installing it in new machines whenever possible.