Fix a Safari bug where local navigation would span on multiple lines

Thanks @alastairjardine for flagging this up!

### Before

![screen shot 2014-08-01 at 12 38 42](https://cloud.githubusercontent.com/assets/85783/3778276/8f002eb4-1970-11e4-860c-09cee60ad526.PNG)


### After

![screen shot 2014-08-01 at 12 38 24](https://cloud.githubusercontent.com/assets/85783/3778278/91daad08-1970-11e4-9a29-a8b867e7d2ac.PNG)

![ ](http://www.realfarmacy.com/wp-content/uploads/2014/07/141-1.gif)