Index: import.php
===================================================================
--- import.php	(revision 46888)
+++ import.php	(working copy)
@@ -42,7 +42,7 @@
 // Detect and redirect invalid importers like 'movabletype', which is registered as 'mt'
 if ( ! empty( $_GET['invalid'] ) && isset( $popular_importers[ $_GET['invalid'] ] ) ) {
 	$importer_id = $popular_importers[ $_GET['invalid'] ]['importer-id'];
-	if ( $importer_id != $_GET['invalid'] ) { // Prevent redirect loops.
+	if ( $importer_id !== $_GET['invalid'] ) { // Prevent redirect loops.
 		wp_redirect( admin_url( 'admin.php?import=' . $importer_id ) );
 		exit;
 	}