If I serve /favicon.ico as image/vnd.microsoft.icon, instead of image/x-icon, will it break on any browsers?

Question

If I configure Apache to serve /favicon.ico as MIME type image/vnd.microsoft.icon, instead of image/x-icon, will it break on any browsers? Wikipedia\'s favicon

Answer 1

Google serve /favicon.ico as image/x-icon, and I'd guess they know what they're talking about (or at least, what's compatible).

Answer 2

Off the top of my head, image/vnd.microsoft.icon will work only if the image actually is a real ICO file, while image/x-icon is less fussy, and will also work for bitmaps and GIF images. (Non-ICO files with the .ico file extension are, I believe, quite common.)