Ticket #16859: patch16859.diff

wp-includes/formatting.php

@@ -2246 +2246 @@
 
         if ( '' == $url )
                 return $url;
+                
+        // Preserve parentheses and square brackets     - see #16859
+        $url = str_replace( Array('(',')','[',']'), Array('%28','%29','%5B','%5D'), $url );
+        
         $url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url);
         $strip = array('%0d', '%0a', '%0D', '%0A');
         $url = _deep_replace($strip, $url);