Incorrect list actions tile background in IE9

In IE9, the list actions tile still shows the standard tile background color, rather than the one it should be overridden by.

IE9:

![screen shot 2014-03-06 at 15 30 44](https://f.cloud.github.com/assets/109850/2357045/befb6e9a-a5f7-11e3-8fce-04b0c4058b46.png)

Elsewhere:

![screen shot 2014-03-07 at 12 55 35](https://f.cloud.github.com/assets/109850/2357051/cdfaa3a2-a5f7-11e3-8af8-33da9caa1248.png)