PNG output, but not CSS

[dotherightthing]

Hi,

Thanks for creating this app, spriting is really fiddly so this has the potential to be a massive time-saver, and of course encourage devs to use spriting for faster loading pages.

This is my first time using spritemapper but I am running into a few issues.

1. I have reexported my image files as PNG24
2. I have rewritten my background URL paths to use the default relative pathing
3. I have moved all images to be sprited into a single folder

When I run the generator in Terminal (OS X 10.7.3):

1. the sprite png is output, as a sibling of the target image folder
2. the modified CSS file is output, as a sibling of the source CSS file, but the only modification is that an extra space is inserted before the url() parameter, eg background:url() becomes background: url(), background: url() becomes background: url() etc

Any idea what I could be doing wrong?

Thanks,
Dan