humanmade/WPThumb — pull request #87 by joehoyle (2013-11-10 17:29:39+00:00)
Title: Background fill not working.

Check the attached example, I uploaded a red box and it filled the background with black.

![fill](https://f.cloud.github.com/assets/1651502/1368219/ca49b8ca-398b-11e3-8580-d1fbbd132050.png)

Example code to see this in evidence:
`echo '`