This title runs almost into the down-arrow in the smallest responsive layout mode - it's a few pixels closer in Chrome too (shown here):
![screenshot 2014-01-25 09 01 34](https://f.cloud.github.com/assets/58062/2001662/0b73343a-85c1-11e3-8ff5-9dff0cb13fe0.png)

Might make sense to pull the arrows a bit closer to the right (.panel-title:after left attribute).