Fix IE horizontal flex items

was 

![image 2014-10-27 at 5 52 19 pm](https://cloud.githubusercontent.com/assets/867233/4796288/65b4ab62-5e02-11e4-99b7-d2b53cfab7b0.png)

now

![image 2014-10-27 at 5 51 40 pm](https://cloud.githubusercontent.com/assets/867233/4796291/6f3b88a4-5e02-11e4-8627-6f32e1da6f0f.png)