Thread:Project:Support desk/Some Files Not Typed Properly/reply

Hi!

Manual:$wgFileExtensions has more info on file uploads. However, I think your problem is not related to the file type, but to the MIME type. The MIME type "application/vnd.ms-excell" according to Manual:$wgMimeTypeBlacklist should no longer be blacklistet in your MediaWiki version. However, MediaWiki by default uses the mapping provided in includes/mime.types; this is configurable with Manual:$wgMimeTypeFile. Maybe this detects your file somehow incorrectly?