Twitter Search seems to have dropped or lost its ability to parse shortened URLs, as of Sept. 21, which is the key to surfacing domain searches within shortened URLs.
Not sure if this is a glitch or an intentional change. -- Twitter developer documentation and resources: http://dev.twitter.com/doc API updates via Twitter: http://twitter.com/twitterapi Issues/Enhancements Tracker: http://code.google.com/p/twitter-api/issues/list Change your membership to this group: http://groups.google.com/group/twitter-development-talk