Much has been said about Twitter and its ability to spread news from and to Iran. However, one of the criteria for success is that the people posting on twitters also are visible for others... As it is now some of the Iranian users of Twitter appear to be under censure, in the sense that they can post on Twitter but their messages will not appear on searches. The consequence of this is that whenever one of those blogged twitters post a message containing '#iranelection', then this message wont be visible for people searching for #iranelection. I am not sure of how many which is affected but I have noticed that at least 10 twitters are blogged on searches, and most of them are very active on Twitter. I have tried to contact Twitter but I have not received any explanation for why this censure occurs. Any explanation for why Twitter denies this group of people their freedom of speech will be appreciated.