Comment 2 for bug 1009436

I can't seem to attach two attachments to one report, so here's my minimal urllib example. As an aside, setting the proxies from the environment explicitly seems to be completely unnecessary, since urllib should do that by default unless proxies are explicitly turned off.

I tried downloading different things to see if it made any difference. I haven't conducted an exhaustive search, but I have found that I can download the Google homepage, but not a specific image file. I don't know how the upstream NTLM proxy is configured exactly, so this could just be a coincidence.