PAC proxy scripts don't work with Online Installer on OS X

Our IS dept mandates the use of a web proxy. On OS X I have an Auto Proxy Configuration (.PAC) script setup in System Preferences (again IS mandated because they change the proxies occasionally). The Qt SDK online installer doesn't seem to recognize the use of PAC scripts. I had to change to using a hard-coded proxy address before the --proxy option would work and let me progress past the first screen.

I realize that this might be a general Qt bug, I'll let someone more knowledgeable move it if that's the case. I know very few things do handle PACs properly, but it would be nice if this was one of them