We use a proxy server here at my office. I use group policy to add 2 IP addresses to the proxy exceptions list. This has worked fine for a long time.
After all morning of trouble shooting I found a bug where the first IP address in the exceptions list is NOT bypassing the proxy. I had my firewall vendor monitoring traffic and saw my requests for IP address 1 coming from my proxy server. IP address 2 was coming from my local pc as it should. I had to add a dummy IP address of 22.214.171.124 as the first exception to get things working again.
Anyone ever see this or have a fix? This happened on multiple computers here running WIndows 7 and IE 9 and IE 10.