I was reported in http://jira.jboss.org/jira/browse/JBSEAM-1919 the problem building refdocs in latests snapshots.
In this report, I submit the following patch:

--- doc/reference/en/modules/controls.xml 6 Sep 2007 22:57:32 -0000 1.48
+++ doc/reference/en/modules/controls.xml 12 Sep 2007 15:44:45 -0000
@@ -841,6 +841,7 @@
 <para><emphasis>Description</emphasis></para>
 <para>
 <emphasis>Deprecated. Use <literal><rich:calendar /></literal> instead.</emphasis>
+ </para>
 <para>
 Displays a dynamic date picker component that selects a date for the specified input field.
 The body of the <literal>selectDate</literal> element should contain HTML elements, such as