Index: wp-admin/credits.php
===================================================================
--- wp-admin/credits.php	(revision 20232)
+++ wp-admin/credits.php	(working copy)
@@ -17,7 +17,9 @@
 
 	$results = get_site_transient( 'wordpress_credits_' . $locale );
 
-	if ( ! is_array( $results ) ) {
+	if ( ! is_array( $results )
+		|| ( isset( $results['data']['version'] ) && strpos( $wp_version, $results['data']['version'] ) !== 0 )
+	) {
 		$response = wp_remote_get( "http://api.wordpress.org/core/credits/1.0/?version=$wp_version&locale=$locale" );
 
 		if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )