 <p>You should take a different approach here. Instead of trying to "cancel" the behavior you already applied, why not just use it only in browsers where you need it? Wich means taking it out of your main.css file and only using it like this:</p> <pre><code>&lt;!--[if IE 8]&gt; &lt;style&gt; Here goes all your behavior calls : some_selector { behavior: url(PIE.htc); } &lt;/style&gt; &lt;![endif]--&gt; </code></pre> <p>That way you won't need to overwrite them anywhere else, they will only be applied in IE 8.</p>