Fix debug indicator.

#186 

Before:
![before](https://f.cloud.github.com/assets/310370/1003630/7c276ac6-0a91-11e3-8c77-cd5e6373a733.png)

After:
![after](https://f.cloud.github.com/assets/310370/1003631/7c4ff39c-0a91-11e3-9708-1ad532e1b3f6.png)