Faulty XML import / property export?

[Ingomar Otter]

Folks,

I am implementing a primitive replication based on XMLImport/Export on 2.2.10.

Having written nodes into a Repo using Session.importXML I get the following 
exception when

accessing any document through WebDav:

java.io.IOException: not a long: 2011-12-20T09:24:30.608+01:00
        
org.apache.jackrabbit.server.io.DefaultHandler.exportProperties(DefaultHandler.java:497)
        
org.apache.jackrabbit.server.io.DefaultHandler.exportContent(DefaultHandler.java:399)
        
org.apache.jackrabbit.server.io.DefaultHandler.exportContent(DefaultHandler.java:421)
        
org.apache.jackrabbit.server.io.IOManagerImpl.exportContent(IOManagerImpl.java:177)
        
org.apache.jackrabbit.webdav.simple.DavResourceImpl.spool(DavResourceImpl.java:282)
        
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.spoolResource(AbstractWebdavServlet.java:507)
        
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.doGet(AbstractWebdavServlet.java:473)
        
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.execute(AbstractWebdavServlet.java:314)
        
org.apache.jackrabbit.webdav.server.AbstractWebdavServlet.service(AbstractWebdavServlet.java:263)
        javax.servlet.http.HttpServlet.service(HttpServlet.java:722)

I looked at DefaultHandler, this seems to try to interpret "jcr:created" as 
Long:

protected void exportProperties(ExportContext context, boolean isCollection, 
Node contentNode) throws IOException {
        try {
            // only non-collections: 'jcr:created' is present on the parent 
'fileNode' only
            if (!isCollection && contentNode.getDepth() > 0 && 
contentNode.getParent().hasProperty(JcrConstants.JCR_CREATED)) {
                long cTime = 
contentNode.getParent().getProperty(JcrConstants.JCR_CREATED).getValue().getLong();

jcr:created is defined as date.

Where is the problem? Parsing the value? The value itself?

Cheers,
 Ingomar