Adding RSS Feeds for Twitter Searches into Google Reader

I'm currently having trouble adding RSS feeds for Twitter searches (such as http://search.twitter.com/search.atom... ) into Google Reader. I've tried clicking on the "Subscribe to this page..." icon in Firefox, clicking on the "Feed for this query" link provided by Twitter, and adding it directly in Google Reader. (I'm using Firefox so the icon/link immediately takes me to Google Reader.) But once I add it, I get the message that "the feed being requested cannot be found." I was able to add feeds for searches before. I'm wondering if Twitter's changed something? Does anyone have any suggestions? Should I use a different RSS reader?