Metro Apps (oh, I shouldn't call them Metro, sorry Microsoft but you named them first and then abandoned the name, but it was too late :) ) are still quite rare beasts, especially in corporate environments, but I have to test some recently.
Our company has proxy, which requires authorization. And proxy is announced by means of wpad DNS record. So normally IE is configured with Automatically detect settings and everything works fine.
Except Metro apps, which have very poor support for proxies.
For this test I was provided with direct internet access, but wpad record was still available and while I can uncheck Automatically detect settings checkbox in IE to browse without proxy, Metro apps continue to use wpad, which requires authentication, which in turn upsets Metro Apps...
However there is a workaround for this. You can configure winhttp to use proxy for everything except everything :) (this will effectively turns off wpad auto detection)
Netsh winhttp set proxy myproxy:80 bypass-list="*"
And this trick makes Metro Apps happy :)
