Index: branches/5.2.x/core/admin_templates/js/script.js
===================================================================
diff -u -N -r16249 -r16276
--- branches/5.2.x/core/admin_templates/js/script.js	(.../script.js)	(revision 16249)
+++ branches/5.2.x/core/admin_templates/js/script.js	(.../script.js)	(revision 16276)
@@ -899,13 +899,22 @@
 function set_window_title($title) {
 	var $window = window;
 
-	if ( $window.name != 'main' ) {
-		// traverse through real popups
-		$window = getFrame('main');
+	if ( main_title.length ) {
+		$title += ' - ' + main_title;
 	}
 
-	$window.top.document.title = (main_title.length ? main_title + ' - ' : '') + $title;
+	if ( !$modal_windows && getWindowOpener($window) ) {
+		$window.document.title = $title;
+	}
+	else {
+		if ( $window.name != 'main' ) {
+			// Traverse through real popups.
+			$window = getFrame('main');
+		}
 
+		$window.top.document.title = $title;
+	}
+
 	if ( $modal_windows ) {
 		$window.TB.setWindowTitle('');
 	}