diff --git a/mozilla/layout/html/tests/block/bugs/216303.html b/mozilla/layout/html/tests/block/bugs/216303.html
new file mode 100644
index 00000000000..7dfefff79a6
--- /dev/null
+++ b/mozilla/layout/html/tests/block/bugs/216303.html
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="ISO-8859-1"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
+  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
+<head>
+    <title>Testcase, bug 216303</title>
+    <style type="text/css">
+
+    body {
+        border: medium solid green;
+        padding: 1em;
+        margin: 1em;
+        height: 20em;
+    }
+
+    div {
+        float: left;
+        height: 50%;
+        border: medium solid orange;
+    }
+    </style>
+</head>
+<body>
+
+<div>This orange box should be 50% of the height of the green box.</div>
+
+</body>
+</html>
diff --git a/mozilla/layout/html/tests/block/bugs/rtest.lst b/mozilla/layout/html/tests/block/bugs/rtest.lst
index 7c1d25e01e5..072f5b33193 100644
--- a/mozilla/layout/html/tests/block/bugs/rtest.lst
+++ b/mozilla/layout/html/tests/block/bugs/rtest.lst
@@ -214,6 +214,7 @@
 215857.html
 215857-2.html
 215857-3.html
+216303.html
 217369-1.html
 217369-2.html
 223394-1.html
diff --git a/mozilla/layout/html/tests/block/images/animated_gif.gif b/mozilla/layout/html/tests/block/images/animated_gif.gif
new file mode 100644
index 00000000000..e91e5a124d4
Binary files /dev/null and b/mozilla/layout/html/tests/block/images/animated_gif.gif differ
diff --git a/mozilla/layout/html/tests/table/bugs/bug269566.html b/mozilla/layout/html/tests/table/bugs/bug269566.html
new file mode 100644
index 00000000000..b0a9458500c
--- /dev/null
+++ b/mozilla/layout/html/tests/table/bugs/bug269566.html
@@ -0,0 +1,12 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
+<html><head>
+
+
+</head>
+
+<body style="display:table">
+
+<img src="../images/animated.gif" style="float: left">
+
+
+</body></html>
\ No newline at end of file
diff --git a/mozilla/layout/html/tests/table/bugs/bug275625.html b/mozilla/layout/html/tests/table/bugs/bug275625.html
new file mode 100644
index 00000000000..87ee9ca26e7
--- /dev/null
+++ b/mozilla/layout/html/tests/table/bugs/bug275625.html
@@ -0,0 +1,8 @@
+<html><head><title>Testcase bug 275625 - Crash with a:hover, a:hover+br{display:table-row;}</title>
+<style>
+a, a + br{display:inline;}
+</style>
+</head>
+<body onload="document.styleSheets[0].cssRules[0].style.display = 'table-row'">
+<a href="#">This should not crash</a><br>
+</body></html>
\ No newline at end of file
diff --git a/mozilla/layout/html/tests/table/bugs/bug278266.html b/mozilla/layout/html/tests/table/bugs/bug278266.html
new file mode 100644
index 00000000000..8b3c7e43cb7
--- /dev/null
+++ b/mozilla/layout/html/tests/table/bugs/bug278266.html
@@ -0,0 +1,7 @@
+<html>
+<body onload="document.getElementById('foo').appendChild(document.createTextNode('Second line of text'))">
+There should be text below this line:
+<div style="display: table-row" id="foo">
+</div>
+</body>
+</html>
diff --git a/mozilla/layout/html/tests/table/bugs/rtest.lst b/mozilla/layout/html/tests/table/bugs/rtest.lst
index 3808ebf901b..9e197506b39 100644
--- a/mozilla/layout/html/tests/table/bugs/rtest.lst
+++ b/mozilla/layout/html/tests/table/bugs/rtest.lst
@@ -204,12 +204,15 @@ bug2585.html
 bug26178.html
 bug26553.html
 bug2684.html
+bug269566.html
 bug27038-1.html
 bug27038-2.html
 bug27038-3.html
+bug275625.html
 bug2757.html
 bug2763.html
 bug2773.html
+bug278266.html
 bug27993-1.html
 bug27993-2.html
 bug28341.html
