Index: plugin-install.php
===================================================================
--- plugin-install.php	(http://develop.svn.wordpress.org/trunk/src/wp-admin/includes/plugin-install.php)	(revision 25946)
+++ plugin-install.php	(.../plugin-install.php)	(working copy)
@@ -60,7 +60,7 @@
 	$res = apply_filters( 'plugins_api', false, $action, $args );
 
 	if ( false === $res ) {
-		$url = 'http://api.wordpress.org/plugins/info/1.0/';
+		$url = 'http://api.wordpress.org/plugins/info/1.1/';
 		if ( wp_http_supports( array( 'ssl' ) ) )
 			$url = set_url_scheme( $url, 'https' );
 
@@ -75,7 +75,7 @@
 		if ( is_wp_error($request) ) {
 			$res = new WP_Error('plugins_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), $request->get_error_message() );
 		} else {
-			$res = maybe_unserialize( wp_remote_retrieve_body( $request ) );
+			$res = json_decode( wp_remote_retrieve_body( $request ) );
 			if ( ! is_object( $res ) && ! is_array( $res ) )
 				$res = new WP_Error('plugins_api_failed', __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server&#8217;s configuration. If you continue to have problems, please try the <a href="http://wordpress.org/support/">support forums</a>.' ), wp_remote_retrieve_body( $request ) );
 		}