XWikiDocument#fromXML fail to parse history of a document saved before the xclasses it depends on

<?xml version="1.0" encoding="UTF-8"?>
<xwikidoc>
<web>Panels</web>
<name>Applications</name>
<language></language>
<defaultLanguage></defaultLanguage>
<translation>0</translation>
<parent>Panels.WebHome</parent>
<creator>xwiki:XWiki.Admin</creator>
<author>xwiki:XWiki.Admin</author>
<customClass></customClass>
<contentAuthor>xwiki:XWiki.Admin</contentAuthor>
<creationDate>1387301425000</creationDate>
<date>1385999012000</date>
<contentUpdateDate>1385999012000</contentUpdateDate>
<version>1.1</version>
<title></title>
<defaultTemplate></defaultTemplate>
<validationScript></validationScript>
<comment>Copied from workspacetemplate:Panels.Applications</comment>
<minorEdit>false</minorEdit>
<syntaxId>xwiki/2.1</syntaxId>
<hidden>true</hidden>
<object>
<name>Panels.Applications</name>
<number>0</number>
<className>Panels.PanelClass</className>
<guid>a625d8f2-78e4-4903-ba43-20245c683436</guid>
<property>
<category>Information</category>
</property>
<property>
<content>{{velocity}}
#set($discard = $xwiki.ssx.use('Panels.Applications'))
#set($discard = $xwiki.jsx.use('Panels.Applications'))
#panelheader($services.localization.render('panels.applications.title'))
#foreach($uix in $services.uix.getExtensions('org.xwiki.platform.panels.Applications', {'sortByParameter' : 'label'}))
  #set($params = $uix.getParameters())
  #if($"$!params.icon" != '' &amp;&amp; "$!params.label" != '' &amp;&amp; "$!params.target" != '' &amp;&amp; $xwiki.hasAccessLevel('view', $xcontext.user, $params.target))
(% class="applicationsPanel" %)
* [[image:$params.icon $params.label&gt;&gt;$params.target]]
  #end
#end
#if($xwiki.hasWikiAdminRights())
## We need the 3 newlines below to have a separation between the lists



(% class="applicationsPanel" %)
* [[image:icon:add $services.localization.render('panels.applications.more')&gt;&gt;XWiki.XWikiPreferences||class="applicationPanelMoreButton" queryString="editor=globaladmin&amp;section=XWiki.AddExtensions"]]

(% class="applicationPanelMoreContainer hidden" %)(((
(% class="applicationsPanel" %)
#foreach($uix in $services.uix.getExtensions('org.xwiki.platform.panels.Applications.more', {'sortByParameter' : 'label'}))
  #set($params = $uix.getParameters())
  #if($"$!params.icon" != '' &amp;&amp; "$!params.label" != '' &amp;&amp; "$!params.target" != '')
(% class="applicationsPanel" %)
* [[image:$params.icon $params.label&gt;&gt;$params.target]]
  #end
#end
)))
#end
#panelfooter()
{{/velocity}}</content>
</property>
<property>
<description>Lists the available applications and provides shortcuts to install new ones or to create your own.</description>
</property>
<property>
<name>Applications</name>
</property>
<property>
<type>view</type>
</property>
</object>
<object>
<name>Panels.Applications</name>
<number>0</number>
<className>XWiki.JavaScriptExtension</className>
<guid>cad363e5-351e-4456-9559-84ce5c8e5543</guid>
<property>
<cache>long</cache>
</property>
<property>
<code>var XWiki = (function(XWiki) {

var panels = XWiki.panels = XWiki.panels || {};

panels.MoreApplicationsButtonListener = Class.create({
  initialize: function(button) {
    this.button = button;
    this.container = button.up('div').down('.applicationPanelMoreContainer');
    this.container.id = 'applicationPanelMoreContainer' + Math.floor(Math.random()*101);
    this.isToggling = false;

    this.button.observe('click', function(e) {
      e.stop();
      if (!this.isToggling) {
        this.toggle();
      }
    }.bindAsEventListener(this));

    return this;
  },

  toggle: function() {
    this.isToggling = true;
    if (this.container.hasClassName('hidden')) {
      this.container.style.display = "none";
      this.container.removeClassName('hidden');
      Effect.BlindDown(this.container.id, {
        duration: 0.1,
        afterFinish: function() {
          this.isToggling = false;
        }.bind(this)
      });
    } else {
      Effect.BlindUp(this.container.id, {
        duration: 0.1,
        // We do this to be able to get our hidden element back, we don't rely on
        // display:none since we don't allow nested style in HTML elements.
        afterFinish: function() {
          this.container.addClassName('hidden');
          this.isToggling = false;
        }.bind(this)
      });
    }
  }
});

return XWiki;
}(XWiki || {}));

document.observe('xwiki:dom:loaded', function(e) {
  $$('.applicationPanelMoreButton').each(function(button) {
    new XWiki.panels.MoreApplicationsButtonListener(button);
  });
});</code>
</property>
<property>
<name>Applications Panel</name>
</property>
<property>
<parse>0</parse>
</property>
<property>
<use>onDemand</use>
</property>
</object>
<object>
<name>Panels.Applications</name>
<number>0</number>
<className>XWiki.StyleSheetExtension</className>
<guid>b63b9731-79d8-4ac4-aace-b4df1275e717</guid>
<property>
<cache>long</cache>
</property>
<property>
<code>ul.applicationsPanel li img {
  float:left;
}

div.applicationPanelMoreContainer li a {
  font-size: 90%;
  line-height: 16px;
  font-weight: bold;
}



</code></property><property><name>Applications Panel</name>
</property>
<property>
<parse>0</parse>
</property>
<property>
<use>onDemand</use>
</property>
</object>
<content>{{include document="Panels.PanelSheet"/}}</content></xwikidoc>