@EL-Warez, Read my post again.

Normal RSS works fine. (listing all categories)
But when I want to list ONE category - for example "Magazines", it redirects to Uncategorized.

Normal RSS: http://releasethread.com/feed/

Magazine RSS: http://releasethread.com/category/magazines/feed/

But this redirects to: http://releasethread.com/category/uncategorized/feed/

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EDIT

Ok, I have narrowed down where the problem is.
Wordpress SEO by Yoast.
When this plugin is disabled, my rss feed is fine.
When the plugin is enabled, my rss feed gets redirected.... Hmmmm.

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EDIT 2

I have fixed the problem.
It was down to the Permalink settings in Yoast's Wordpress SEO plugin.
I unticked these boxes, and everything is working fine.



I also haven't seen anything else that has been affected by unticking these... so all's good :-)