Higher quality scaling.

The default scaling settings are too crude. Compare (for reddit.com):

before: ![before](https://f.cloud.github.com/assets/1037172/1643492/ec635f72-58c8-11e3-9b17-cb8197c0e0ff.png)
after: ![after](https://f.cloud.github.com/assets/1037172/1643493/ec63aa04-58c8-11e3-95d8-e1860304c118.png)