diff --git a/layout/base/crashtests/534368-1.xhtml b/layout/base/crashtests/534368-1.xhtml
new file mode 100644
index 00000000000..7f07902e3ab
--- /dev/null
+++ b/layout/base/crashtests/534368-1.xhtml
@@ -0,0 +1,14 @@
+<html xmlns="http://www.w3.org/1999/xhtml" style="position: absolute; font-size: 1000px; -moz-column-count: 3;">
+<script>
+
+function boom()
+{
+  var newSS = document.createElementNS("http://www.w3.org/1999/xhtml", "style");
+  newSS.appendChild(document.createTextNode("whattheheck:first-line {}"));
+  document.getElementById("h").appendChild(newSS);
+}
+window.addEventListener("load", boom, false);
+
+</script>
+<head id="h" style="overflow-x: scroll; display: block;"><style style="position: absolute; display: block;">zz ]</style><style style="display: none;">[</style><style style="display: none;">[e='zz']:nth-last-child(odd) {}</style><style style="display: none;"></style><style style="display: none;">[c]</style><style style="display: none;">[c]</style><style style="display: none;">[class='zzzzz'] {}</style></head>
+</html>
diff --git a/layout/base/crashtests/crashtests.list b/layout/base/crashtests/crashtests.list
index 9472e295b35..9f6c109bd1a 100644
--- a/layout/base/crashtests/crashtests.list
+++ b/layout/base/crashtests/crashtests.list
@@ -287,6 +287,7 @@ load 522374-1.html
 load 522374-2.html
 load 526378-1.xul
 load 534367-1.xhtml
+load 534368-1.xhtml
 load 534768-1.html
 load 534768-2.html
 load 535721-1.xhtml
