Internet Explorer proxy bug?

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 1.1.1.1 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.
cb_itAsked:
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gheistCommented:
Probably you added some comma where semicolon had to be, or asterisk where not expected.

Easy central fix is to let those sites be served by proxy too.
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giltjrCommented:
Can you post your proxy pac file?
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gheistCommented:
Not if he can post... I think it is more - could Asker implement PAC file or even WPAD?
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cb_itAuthor Commented:
We are not using pac files, that I know of. Just plugging 2 IP addresses into group policy. Has anyone ever heard of this bug? Very strange. I did double check the settings and did not see a rogue comma or asterisk anywhere. I may take the first suggestion and have those sites allow the proxy.
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giltjrCommented:
Stupid question. What happens if you put another IP address as the 1st in the list, say like 127.0.0.1?
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cb_itAuthor Commented:
Seems that there was a semicolon missing after all as gheist suggested.

I had <local>1.1.1.1;2.2.2.2;3.3.3.3

I guess there should be a semicolon after <local>. I also read that <local> should be at the end? So I changed it to this 1.1.1.1;2.2.2.2;3.3.3.3;<local> and things work now. Thanks so much for the help
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gheistCommented:
Read wikipedia on proxy.pac and wpad... It is much easier as all new configuration deploys in an instant.
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