Index: wp-includes/wp-db.php
===================================================================
--- wp-includes/wp-db.php	(revision 21810)
+++ wp-includes/wp-db.php	(working copy)
@@ -1216,9 +1216,11 @@
 			$return_val = $this->rows_affected;
 		} else {
 			$num_rows = 0;
-			while ( $row = @mysql_fetch_object( $this->result ) ) {
-				$this->last_result[$num_rows] = $row;
-				$num_rows++;
+			if ( is_resource( $this->result ) ) {
+				while ( $row = mysql_fetch_object( $this->result ) ) {
+					$this->last_result[$num_rows] = $row;
+					$num_rows++;
+				}
 			}
 
 			// Log number of rows the query returned
@@ -1556,11 +1558,11 @@
 	 * @access protected
 	 */
 	protected function load_col_info() {
-		if ( $this->col_info )
+		if ( $this->col_info || ! is_resource( $this->result ) )
 			return;
 
-		for ( $i = 0; $i < @mysql_num_fields( $this->result ); $i++ ) {
-			$this->col_info[ $i ] = @mysql_fetch_field( $this->result, $i );
+		for ( $i = 0; $i < mysql_num_fields( $this->result ); $i++ ) {
+			$this->col_info[ $i ] = mysql_fetch_field( $this->result, $i );
 		}
 	}