diff --git a/mozilla/layout/base/crashtests/337066-1.xhtml b/mozilla/layout/base/crashtests/337066-1.xhtml
new file mode 100644
index 00000000000..fadc453f401
--- /dev/null
+++ b/mozilla/layout/base/crashtests/337066-1.xhtml
@@ -0,0 +1,22 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<script>
+
+function init()
+{ 
+  var A = document.getElementById("A");
+  var B = document.getElementById("B");
+
+  for (var i = 0; i &lt; 2; ++i)
+    B.insertBefore(document.createElement("span"), A);
+}
+
+</script>
+</head>
+
+<body onload="init()">
+
+<em id="B"><td></td><span id="A"><div></div></span></em>
+
+</body>
+</html>
\ No newline at end of file
diff --git a/mozilla/layout/base/crashtests/crashtests.list b/mozilla/layout/base/crashtests/crashtests.list
index 30335eb82be..b3b466cdb0a 100644
--- a/mozilla/layout/base/crashtests/crashtests.list
+++ b/mozilla/layout/base/crashtests/crashtests.list
@@ -19,6 +19,7 @@ load 331679-3.xml
 load 335140-1.html
 load 336291-1.html
 load 336999-1.xul
+load 337066-1.xhtml
 load 337268-1.html
 load 337419-1.html
 load 337476-1.xul
