Themeroller is broken?

Themeroller is broken?

I can't seem to get themeroller to work and I don't know if I'm doing something wrong?

I've tried several different themes as complex as having changed everything to as simple as just changing 1 color in a pre-existing theme. Every time I download I get no css folder, and if I go into themes and then custom-themes that folder just has 1 base css file in there with a bunch of includes and that is it. The base folder has all the default css files, with none of my changes.

Am I missing something or is it just broken?

Thanks