EllisLab/CodeIgniter — pull request #3079 by seanfahey (2014-06-03 19:35:47+00:00)
Title: Added MIME types for .ppt uploads

I was not able to upload a .ppt (1997 - 2003 compatible) exported from Keynote. Checking the MIME type under OSX using file --mime-type on the file I get back "application/vnd.ms-office". My web server identifies the file as application/msword. I have added these both to the ppt array in mimes.php.