Today (Thu 2013-06-06 07:09) Twitter updated the doc page for twitter api (previos update on this page was on 2012-08-25). They changed the item “limitations” (see that page).
They add the following point:
“In API v1.1, the Search API requires some form ofauthentication – either OAuth 1.0A or app-only auth”
(It wasn’t in previos version of doc) WTF!
They don’t prevent us about this issue. I’m furious! Thanks twitter