MediaElement.js Internet Explorer 8 showing blocky rectangles - internet-explorer-8

Question

I am using the MediaElement.js Wordpress plugin in order to play MP3s on my homepage.
But on Internet Explorer 8 I have trouble with the plugin.
Instead of the play button and the volume button, it only shows a blocky rectangle.
I have tested on two different computers with the same result.
You can test it here: http://www.alatarmusic.com/noise-reduction/
It works fine with Firefox and with Safari on my iPhone. And I know, that other sites show up fine in my Internet Explorer. For example, the player on MediaElementJS.com looks correct. It seems, something is wrong with my homepage?
But what could be the reason for this?

Answer 1

Was having the same issue in IE7 as well as IE8:
The fix for me was making sure the filter style was reset:
filter: none;

Answer 2

Your style-sheet contains the following CSS:
.post .content button{background:linear-gradient(top,#ffffff 0%,#e9e9e9 100%);-ms-filter:"progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff',endColorstr='#e9e9e9')";
Beautified:
.post .content button {
background: linear-gradient(top,#ffffff 0%,#e9e9e9 100%);
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff',endColorstr='#e9e9e9')";
}
The last property, -ms-filter, is a proprietary CSS extension by Microsoft, which is only parsed by Internet Explorer.
The color #ffffff is white, and the color #e9e9e9 is light gray.
Because the effect does only work in Internet Explorer, only IE users will see a light-colored rectangle instead of a play button.
Setting the filter to none gives back the button:
This markup does probably effect other buttons in your Wordpress blog, so removing it might not be an option. Instead, you can add filter:none to the CSS for .mejs-button; e.g.:
.mejs-button{
filter: none;
}