Bad zh_CN file in wicket-extensions-jar

Hello,

We have received following error report:

INFO 07-09 21:43:29.953 o.a.w.r.PropertiesFactory:209
[http-nio-0.0.0.0-5080-exec-1] - Loading properties files from
jar:file:/C:/om/apache-openmeetings-3.0.2/webapps/openmeetings/WEB-INF/lib/wicket-extensions-jar-6.14.0.jar!/org/apache/wicket/extensions/wizard/Wizard_zh_CN.properties.xml
with loader org.apache.wicket.resource.XmlFilePropertiesLoader [ at ] aff419
WARN 07-09 21:43:29.984 o.a.w.r.PropertiesFactory:242
[http-nio-0.0.0.0-5080-exec-1] - Unable to find resource
jar:file:/C:/om/apache-openmeetings-3.0.2/webapps/openmeetings/WEB-INF/lib/wicket-extensions-jar-6.14.0.jar!/org/apache/wicket/extensions/wizard/Wizard_zh_CN.properties.xml
java.util.InvalidPropertiesFormatException: org.xml.sax.SAXParseException;
lineNumber: 22; columnNumber: 56; Invalid byte 2 of 3-byte UTF-8 sequence.
at java.util.XMLUtils.load(XMLUtils.java:76) ~[na:1.7.0_55]
at java.util.Properties.loadFromXML(Properties.java:868) ~[na:1.7.0_55]
at org.apache.wicket.util.io.Streams.loadFromXml(Streams.java:136)
~[wicket-util-jar-6.14.0.jar:6.14.0]

Seems Chinese resources bundled into wicket-extensions contains bad XML