"There is some speculation that Twitter may be banning #flotilla from its trending calculations. Twitter can ban common words so as not to give false results. But #flotilla is hardly a common word. Last June, Twitter intervened (at the request of the State Dept.) to keep its servers going when #iranelection was trending. It was rightly applauded for doing so. So what's up with not allowing #flotilla to trend, and redirecting searches on the word to the homepage (just try it from your account.)"