For some unknown reason, Google searches are coming back with a Sophos Block Page with "Bad Request (Request Line Invalid)" below are the web filtering logs and attached is a screen shot of the block page. A simple refresh of the page loads the search results. In this example, all I did was search for Dell Factory Outlet in the browser (IE 11) address bar.
Any ideas where to start looking? Here are the proxy filtering logs...
2014:04:24-20:17:04 gateway httpproxy[12403]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="192.168.2.100" dstip="173.194.46.84" user="" statuscode="302" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="367" request="0xcc547a0" url="www.google.com/search
2014:04:24-20:17:04 gateway httpproxy[12403]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="192.168.2.100" dstip="8.28.16.203" user="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="61" request="0xd31f3a8" url="sp.cwfservice.net/.../search
2014:04:24-20:17:05 gateway httpproxy[12403]: id="0002" severity="info" sys="SecureWeb" sub="http" name="web request blocked" action="block" method="" srcip="192.168.2.100" dstip="" user="" statuscode="400" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction=" ()" size="2605" request="0xcc547a0" url="" exceptions="" error="Bad request (Request line invalid)"
2014:04:24-20:17:05 gateway httpproxy[12403]: id="0001" severity="info" sys="SecureWeb" sub="http" name="http access" action="pass" method="GET" srcip="192.168.2.100" dstip="173.194.46.84" user="" statuscode="200" cached="0" profile="REF_DefaultHTTPProfile (Default Proxy)" filteraction="REF_DefaultHTTPCFFAction (Default content filter action)" size="0" request="0xcc547a0" url="www.google.com/search
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