Thread:Project:Support desk/accessing site using http transfers

When anyone on our intranet tries to access our local mediawiki site (using 1.19) using regular http://wiki... it forwards to our corporate http://www... address despite getting the right IP address. The only way to get to the site is using https:// designation (where it won't forward to the corporate web page). What's going on here? Is this an apache problem? I KNOW it's getting the right IP address because dig, nslookup, and my proxy.pac alert message shows it's getting the right one. Thanks...