When using structure and template, The entity "reg" was referenced, but not declared Error in Web Content Portlet

• Type: Bug
• Status: Closed
• Resolution: Duplicate
• Affects Version/s: 6.1.1 CE GA2
• Fix Version/s: 6.0.X EE, 6.1.30 EE GA3, 6.2.0 CE M5
• Component/s: Web Content > Web Content Administration
• Labels:
  • 6.0_release_notes
  • ee-ts
• Environment: LIFERAY VERSION: 6.1 GA1 ; OPERATING SYSTEM: Red Hat Enterprise 6 ; APPLICATION SERVER: Tomcat 7.0 ; JAVA VIRTUAL MACHINE: Java 6 ; DATABASE: Oracle 11.1

ISSUE
When using a structure and template in a web content article with special characters (such as ®) will result in an error when publishing. The content will also be blank when going back to edit it.

ERRORS/LOGS

21:55:09,020 ERROR [LocaleTransformerListener:129] 
com.liferay.portal.kernel.xml.DocumentException: Error on line 8 of document  : The entity "reg" was referenced, but not declared. Nested exception: The entity "reg" was referenced, but not declared.

STEPS TO REPRODUCE
1. Create structure

<?xml version="1.0"?>

<root>
	<dynamic-element name="headline" type="text" index-type="" repeatable="false"/>
	<dynamic-element name="body" type="text_area" index-type="" repeatable="false"/>
</root>

2. Create template using the structure in #1
Template:

$headline.getData()
<br>
<br>
$body.getData()

3. Create a webcontent for a site using the template.
4. Add title.
5. In the text area, add the following text Company®
6. Click publish