How can I remove "blog/" from the RSS feed URL?

Hello good people,

How can I remove "blog/" from the RSS feed URL?

I updated a single site WordPress installation to multisite and all of the RSS feed addresses changed.

Now the blog/ directory is in the feed address and all the original feed addresses (which all members and iTunes users have) are broken.

BEFORE MULTISITE

http://www.domain.com/category/categoryname/feed/

AFTER MULTISITE

http://www.domain.com/blog/category/categoryname/feed/

How can I remove "blog/" from the RSS feed URL?

I really, really, gotta, gotta get this feed back up fast!

Thank you,

Chris