unreadable Header, when files are selected

before selecting:
![before](https://f.cloud.github.com/assets/1482341/412893/cfe0477a-abd5-11e2-9b78-0f3cfe3e5796.png)
after selecting:
![after](https://f.cloud.github.com/assets/1482341/412892/cfa4a0ee-abd5-11e2-9964-6f32a6aee769.png)
