Re: V1.0 - No gradients in IE9, works in IE8
The key is to have the correct MIME type, as described here: http://css3pie.com/documentation/known-issues
Serving the correct Content-Type
IE requires that HTC behaviors are served up with a content-type header of "text/x-component", otherwise it will simply ignore the behavior. Many web servers are preconfigured to serve the correct content-type, but others are not.
If you have problems with the PIE behavior not being applied, check your server configuration and if possible update it to use the correct content-type. For Apache, you can do this in a .htaccess file:
AddType text/x-component .htc
If for some reason you are unable to modify the server configuration (e.g. if you are on a shared host which does not allow custom .htaccess files), then you may also use a wrapper script. For instance, PIE includes in its distribution files a PHP script called PIE.php; this script simply serves up the PIE.htc file using the correct content-type header. To use it, simply make sure both PIE.php and PIE.htc are in the same directory, and then in your CSS point the behavior to the PHP file instead:
Note that this issue is particularly a problem in IE 9, which seems more strict about the content-type than some other IE versions.