Tagcloud document cannot be opened in GoGreen

When I go to https://cms.demo.onehippo.com/ and in documents / hippogogreen / tagclouds try to open a document, no document is opened. :-{ The same is true when I do the same in the checkout from the trunk. Nasty stacktraces there!

[INFO] [talledLocalContainer] 08.08.2011 23:34:37 ERROR [org.onehippo.forge.tcmp.common.Utils.getModelForNode():103]
[INFO] [talledLocalContainer] java.lang.NullPointerException
[INFO] [talledLocalContainer] at org.onehippo.forge.tcmp.common.Utils.getModelForNode(Utils.java:100)
[INFO] [talledLocalContainer] at org.onehippo.forge.tcmp.model.TagCloud.getModelMap(TagCloud.java:88)
[INFO] [talledLocalContainer] at org.onehippo.forge.tcmp.preview.PreviewPlugin$TagCloudView.getItemModels(PreviewPlugin.java:245)
[INFO] [talledLocalContainer] at org.apache.wicket.markup.repeater.RefreshingView.onPopulate(RefreshingView.java:94)
[INFO] [talledLocalContainer] at org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(AbstractRepeater.java:131)
etc...