404 RSS After Hack and Reinstall

Hey, hope someone knows how to fix this! I’ve been looking through all sorts of websites, asking advice, etc and I haven’t found the solution yet.

On Monday I was hacked and my blog was rendered unusable (couldn’t even access the Dashboard, and the backups wouldn’t work at all) so I removed the old installation then started again from scratch. Under the same sub-domain.

Since then whenever I click on any of my RSS links (including the one in the browser bar itself) it leads me to this message:

“Not Found

The requested URL /blog/feed/ was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.”

I run two WP blogs (one a blog, one a webcomic) on the same domain and this is only affecting the blog.

Main Page:
http://www.shadesofadream.com/blog (still sorting theme, excuse the eyesore =( )
Example of error:
http://www.shadesofadream.com/blog/feed/

Actions already taken:

-Plugins deactivated and reactivated.
-Plugin to find blank spaces in all php files run (it found over 200 errors, but didn’t fix the problem)
-Compared files to the working WP installation for webcomics – no difference other than the route (ie. /webcomic/feed rather than /blog/feed)

I’m wondering if the reason there’s a problem is to do with the old, hacked feed having the same name as the new feed. Possible?

Thanks for your help, just hope we can get this solved.