Index: wp-includes/class-http.php
===================================================================
--- wp-includes/class-http.php	(revision 18542)
+++ wp-includes/class-http.php	(revision )
@@ -1055,6 +1055,15 @@
 				curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'PUT' );
 				curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
 				break;
+			case 'DELETE':
+				curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'DELETE' );
+				break;
+			case 'OPTIONS':
+				curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'OPTIONS' );
+				break;
+			case 'TRACE':
+				curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'TRACE' );
+				break;
 		}
 
 		if ( true === $r['blocking'] )