I see a gap between the toolbar and the splitview:

![screen shot 2014-01-15 at 8 25 05 pm](https://f.cloud.github.com/assets/1269969/1927792/b53b2460-7e68-11e3-99b5-1cbdee0d8089.png)

The polymer toolbar is 40 px high - did you mean to set this to 46px?