drwex | Anyone know Joomla?

I'm having a minor spot of trouble and the various docs I've read online aren't helpful.

I'm trying to add my own CSS styles. I'm using the default template, and I've edited template.css to include them.

I can view source on my page and see that /templates/rhuk_milkyway/css/template.css is indeed being included. When I open up that page in the browser directly I can see that my style is there. I tested the style by writing a little HTML file on my local disk and viewing it in the browser and the style works as I'd expect, but somehow when the page is rendered, the style is not picked up.