The dangers of cross-browser testing with the IE9 browser modes · Links
22 March 2013 · PPK
Turns out the IE9 browser modes, where you can revert to the IE8, IE7, and IE5.5 rendering engines, don't exactly emulate those engines. There are slight differences; for instance in the implementation of @font-face
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Imagine my surprise.
Read more: http://blog.typekit.com/2013/03/14/the-dangers-of-cross-browser-testing-with-ie9s-browser-modes/