Index: src/wp-includes/js/wplink.js
===================================================================
--- src/wp-includes/js/wplink.js	(revision 26454)
+++ src/wp-includes/js/wplink.js	(working copy)
@@ -173,7 +173,7 @@
 			html = '<a href="' + attrs.href + '"';
 
 			if ( attrs.title )
-				html += ' title="' + attrs.title + '"';
+				html += ' title="' + attrs.title.replace( /"/g, '&quot;' ) + '"';
 			if ( attrs.target )
 				html += ' target="' + attrs.target + '"';