Thread:Project:Support desk/Trying to upload a doc file gives error: "Cannot upload this file because Internet Explorer would detect it as "application/msword", which is a disallowed and potentially dangerous file type."/reply

The problem is that the mime type for Word Documents is in the "Blacklisted mime types" by default

If its just Word documents you want to allow, then add the following to your LocalSettings.php. If there is anything else you want to allow, just remove it from the array :

$wgMimeTypeBlacklist = array ( "text/html", "text/javascript", "text/x-javascript", "application/x-shellscript", "application/x-php", "text/x-php", "text/x-python", "text/x-perl", "text/x-bash", "text/x-sh", "text/x-csh", "text/scriptlet", "application/x-msdownload", "application/x-msmetafile", "application/x-opc+zip", "application/vnd.ms-powerpoint", "application/vnd.msexcel" );
 * 1) The $wgMimeTypeBlacklist is the same as defined by default, except I removed
 * 2) "application/msword" to allow word docs