We noticed on our website that the CSS was broken with IE11, while it worked fine with IE10. After a look at the CSS source, it turns out that IE11 (it seems) has dropped its support for attributes matchers: we tried on our VM, we tried on BrowserStack, and the result is that these rules...
img[src$='separator.png'] { display: none; }
a[href="javascript:addBookemart()"] { text-decoration: none; }
... do work on IE10, but not anymore on IE11. I find it hard to believe that the support for this feature would've been dropped... plus, I can't find anyone talking about such a thing over the interwebs. Might there be anything else causing this issue?
Here's a pen for testing purposes:
http://codepen.io/anon/pen/GJNyJW