left nav and footer content overlap fix

before

![ri org](https://f.cloud.github.com/assets/957321/210579/e3bc6aa8-8295-11e2-99c4-6719b8183a41.png)

after

![ri-fix org](https://f.cloud.github.com/assets/957321/210585/0e6e4884-8296-11e2-89f5-618a8374e167.png)