Comment 7 for bug 613550

Sorry if I expressed myself wrong, the goal was not to doubt your results but rather to try to find a reason in configuration and choices during the installer that would cause it not to ask for proxy info. I tried d-i on server with a standard server install and a JeOS install on ESX, as well as an install of alternate on actual hardware and can confirm this bug.

I've attached the contents of /var on the installer, hoping this will help.