--- common.inc	2009-12-16 22:47:10.000000000 +0200
+++ common.inc	2010-02-12 14:28:10.000000000 +0200
@@ -2422,6 +2422,8 @@ function drupal_clear_js_cache() {
  * Converts a PHP variable into its Javascript equivalent.
  *
  * We use HTML-safe strings, i.e. with <, > and & escaped.
+ * We're also escaping \ " / \' as well as
+ * backspace, form feed, line feed and carriage return.
  */
 function drupal_to_js($var) {
   switch (gettype($var)) {
@@ -2432,9 +2434,9 @@ function drupal_to_js($var) {
       return $var;
     case 'resource':
     case 'string':
-      return '"'. str_replace(array("\r", "\n", "<", ">", "&"),
-                              array('\r', '\n', '\x3c', '\x3e', '\x26'),
-                              addslashes($var)) .'"';
+      return '"'. str_replace(array("\\", "<", ">", "&", '"', '/', "\'", "\x62", "\x66", "\x6E", "\x72", "\x74", "\x00", "\x01", "\x02", "\x03", "\x04", "\x05", "\x06", "\x07", "\x08", "\x0A", "\x0B", "\x0C", "\x0D", "\x0E", "\x0F", "\x10", "\x11", "\x12", "\x13", "\x14", "\x15", "\x16", "\x17", "\x18", "\x1A", "\x1B", "\x1C", "\x1D", "\x1E", "\x1F"),
+                              array('\\\\', '\u003c', '\u003e', '\u0026', '\u0022', '\u002F', 'u0027', '\u0008', '\u000C', '\u000A', '\u000D', '\u0009', '\u0000', '\u0001', '\u0002', '\u0003', '\u0004', '\u0005', '\u0006', '\u0007', '\u0008', '\u000A', '\u000B', '\u000C', '\u000D', '\u000E', '\u000F', '\u0010', '\u0011', '\u0012', '\u0013', '\u0014', '\u0015', '\u0016', '\u0017', '\u0018', '\u001A', '\u001B', '\u001C', '\u001D', '\u001E', '\u001F'),
+                              $var) .'"';
     case 'array':
       // Arrays in JSON can't be associative. If the array is empty or if it
       // has sequential whole number keys starting with 0, it's not associative