diff --git a/mozilla/layout/html/tests/block/bugs/199673-1.html b/mozilla/layout/html/tests/block/bugs/199673-1.html
new file mode 100644
index 00000000000..5fa33b54418
--- /dev/null
+++ b/mozilla/layout/html/tests/block/bugs/199673-1.html
@@ -0,0 +1,26 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+<head>
+<title>Testcase, bug 199673</title>
+</head>
+<body>
+<p><a href="http://brazil.joelonsoftware.com"><font size="1">Brazilian Portuguese</font></a><br>
+<a href="http://bulgarian.joelonsoftware.com"><font size="1">Bulgarian</font></a><br></p>
+
+<p><a href="http://brazil.joelonsoftware.com">X<font size="1">Brazilian Portuguese</font></a><br>
+<a href="http://bulgarian.joelonsoftware.com"><font size="1">Bulgarian</font></a><br></p>
+
+<p style="text-decoration: underline"><font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p style="text-decoration: underline">X<font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p><font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p>X<font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+</body>
+</html>
diff --git a/mozilla/layout/html/tests/block/bugs/199673-2.html b/mozilla/layout/html/tests/block/bugs/199673-2.html
new file mode 100644
index 00000000000..271ffc52466
--- /dev/null
+++ b/mozilla/layout/html/tests/block/bugs/199673-2.html
@@ -0,0 +1,25 @@
+<html>
+<head>
+<title>Testcase, bug 199673</title>
+</head>
+<body>
+<p><a href="http://brazil.joelonsoftware.com"><font size="1">Brazilian Portuguese</font></a><br>
+<a href="http://bulgarian.joelonsoftware.com"><font size="1">Bulgarian</font></a><br></p>
+
+<p><a href="http://brazil.joelonsoftware.com">X<font size="1">Brazilian Portuguese</font></a><br>
+<a href="http://bulgarian.joelonsoftware.com"><font size="1">Bulgarian</font></a><br></p>
+
+<p style="text-decoration: underline"><font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p style="text-decoration: underline">X<font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p><font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p>X<font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+</body>
+</html>
diff --git a/mozilla/layout/html/tests/block/bugs/199673-3.html b/mozilla/layout/html/tests/block/bugs/199673-3.html
new file mode 100644
index 00000000000..3fb9f7bea8f
--- /dev/null
+++ b/mozilla/layout/html/tests/block/bugs/199673-3.html
@@ -0,0 +1,26 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+<title>Testcase, bug 199673</title>
+</head>
+<body>
+<p><a href="http://brazil.joelonsoftware.com"><font size="1">Brazilian Portuguese</font></a><br>
+<a href="http://bulgarian.joelonsoftware.com"><font size="1">Bulgarian</font></a><br></p>
+
+<p><a href="http://brazil.joelonsoftware.com">X<font size="1">Brazilian Portuguese</font></a><br>
+<a href="http://bulgarian.joelonsoftware.com"><font size="1">Bulgarian</font></a><br></p>
+
+<p style="text-decoration: underline"><font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p style="text-decoration: underline">X<font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p><font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+<p>X<font size="1">Brazilian Portuguese</font><br>
+<font size="1">Bulgarian</font><br></p>
+
+</body>
+</html>
diff --git a/mozilla/layout/html/tests/block/bugs/file_list.txt b/mozilla/layout/html/tests/block/bugs/file_list.txt
index 77b28f71efa..cd4743945ff 100644
--- a/mozilla/layout/html/tests/block/bugs/file_list.txt
+++ b/mozilla/layout/html/tests/block/bugs/file_list.txt
@@ -208,6 +208,9 @@ file:///s:/mozilla/layout/html/tests/block/bugs/185411-1.html
 file:///s:/mozilla/layout/html/tests/block/bugs/185411-2.html
 file:///s:/mozilla/layout/html/tests/block/bugs/185411-3.html
 file:///s:/mozilla/layout/html/tests/block/bugs/196919.html
+file:///s:/mozilla/layout/html/tests/block/bugs/199673-1.html
+file:///s:/mozilla/layout/html/tests/block/bugs/199673-2.html
+file:///s:/mozilla/layout/html/tests/block/bugs/199673-3.html
 file:///s:/mozilla/layout/html/tests/block/bugs/215857.html
 file:///s:/mozilla/layout/html/tests/block/bugs/215857-2.html
 file:///s:/mozilla/layout/html/tests/block/bugs/215857-3.html
diff --git a/mozilla/layout/html/tests/block/bugs/rtest.lst b/mozilla/layout/html/tests/block/bugs/rtest.lst
index ccbbbd05030..887e636999d 100644
--- a/mozilla/layout/html/tests/block/bugs/rtest.lst
+++ b/mozilla/layout/html/tests/block/bugs/rtest.lst
@@ -208,6 +208,9 @@
 185411-2.html
 185411-3.html
 196919.html
+199673-1.html
+199673-2.html
+199673-3.html
 215857.html
 215857-2.html
 215857-3.html
