diff --git a/layout/reftests/bugs/334829-1-ref.xhtml b/layout/reftests/bugs/334829-1-ref.xhtml
new file mode 100644
index 000000000000..d6f16bdef834
--- /dev/null
+++ b/layout/reftests/bugs/334829-1-ref.xhtml
@@ -0,0 +1,6 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<body>
+<div id="testDiv" style="width: 0">This is text in a div This text should appear</div>
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/334829-1a.xhtml b/layout/reftests/bugs/334829-1a.xhtml
new file mode 100644
index 000000000000..b5c05b5d1257
--- /dev/null
+++ b/layout/reftests/bugs/334829-1a.xhtml
@@ -0,0 +1,33 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <bindings xmlns="http://www.mozilla.org/xbl">
+    <binding id="test">
+      <content>
+        <span><children/></span>
+      </content>
+    </binding>
+  </bindings>
+  <script type="application/x-javascript">
+    function runTest() {
+      var div = document.getElementById("testDiv");
+
+      // First we have to make sure that we've looked up the primary frame for
+      // the textnode.  Appending a space should do the trick.
+      div.firstChild.data += " ";
+
+      // Now flush our reflow
+      document.body.offsetWidth;
+
+      var node = document.createElementNS("http://www.w3.org/1999/xhtml",
+                                          "span");
+      div.appendChild(node);
+      node.appendChild(document.createTextNode("This text should appear"));
+    }
+  </script>
+</head>
+
+<body onload="runTest()">
+<div id="testDiv" style="width: 0; -moz-binding: url(#test)">This is text in a div</div>
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/334829-1b.xhtml b/layout/reftests/bugs/334829-1b.xhtml
new file mode 100644
index 000000000000..8a083d3a0204
--- /dev/null
+++ b/layout/reftests/bugs/334829-1b.xhtml
@@ -0,0 +1,34 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <bindings xmlns="http://www.mozilla.org/xbl">
+    <binding id="test">
+      <content>
+        <span><children/></span>
+      </content>
+    </binding>
+  </bindings>
+  <script type="application/x-javascript">
+    function runTest() {
+      var div = document.getElementById("testDiv");
+
+      // First we have to make sure that we've looked up the primary frame for
+      // the previous child span.  Appending text to it should do the trick.
+      div.firstChild.
+          appendChild(document.createTextNode("This is text in a div "));
+
+      // Now flush out reflow
+      document.body.offsetWidth;
+
+      var node = document.createElementNS("http://www.w3.org/1999/xhtml",
+                                          "span");
+      div.appendChild(node);
+      node.appendChild(document.createTextNode("This text should appear"));
+    }
+  </script>
+</head>
+
+<body onload="runTest()">
+<div id="testDiv" style="width: 0; -moz-binding: url(#test)"><span></span></div>
+
+</body>
+</html>
diff --git a/layout/reftests/bugs/reftest.list b/layout/reftests/bugs/reftest.list
index b2b51aeb7b5a..b51ec8e6b4de 100644
--- a/layout/reftests/bugs/reftest.list
+++ b/layout/reftests/bugs/reftest.list
@@ -141,6 +141,8 @@ random == 328829-1.xhtml 328829-1-ref.xhtml # bug 369046 (intermittent)
 == 332360-width-ltr.html 332360-ltr-ref.html
 == 332557-1.html 332557-1-ref.html
 == 332975-1.html 332975-1-ref.html
+== 334829-1a.xhtml 334829-1-ref.xhtml
+== 334829-1b.xhtml 334829-1-ref.xhtml
 == 335628-1.html 335628-1-ref.html
 != 335628-2.xul 335628-2-ref.xul
 == 336147-1.html 336147-1-ref.html
