Unless downloadable fonts used by a web page are marked as installable, IE 10/11 won't load them, refusing with the console error:
CSS3114: @font-face failed OpenType embedding permission check. Permission must be Installable.
The whole point of the print/preview and editable embedding permissions in the Opentype spec is to permit temporary use.
see http://www.microsoft.com/typography/otspec/os2.htm#fst
When will IE fix this bug? It's been around for years (predating IE9, I believe, but have no way to confirm how far back it goes).