Background: For some reason, whenever a user tries to open an xslx (excel 2007) file from our intranet using MSIE, the file download dialog interprets it as a "zip" file.
Admittedly, xslx files really are zip files, but we don't want that behavior. Just open in Excel, please.
Firefox, OTOH, opens the files normally. Is it possible that the fault is my apache configs? or is this a client-browser-only issue?