The documentation for the /search method  specifies that all queries should be performed with an HTTP GET. On or after July 15, 2009, we will begin enforcing the use of HTTP GET for all queries. Requests sent to the /search method which are not performed with an HTTP GET will be met with an HTTP 403 response.
Please check your code and make any necessary updates before this change is deployed. 1. http://apiwiki.twitter.com/Twitter-Search-API-Method%3A-search Thanks, Doug