Browser crash when uploading images

When uploading images to the CMS the FF browser crashed. This was reproducable several times. The only way to move forward was to kill the browser.
If the stacktraces below do not help, add more logging information.

From the log files:

22.09.2009 16:19:16 ERROR
[org.hippoecm.frontend.editor.model.ValueTemplateProvider.addNew():101]
no matching property definition found for

{http://www.onehippo.com/nt/1.0}

text
javax.jcr.nodetype.ConstraintViolationException: no matching property
definition found for

{http://www.onehippo.com/nt/1.0}

text
at org.apache.jackrabbit.core.nodetype.EffectiveNodeType.getApplicablePropertyDef(EffectiveNodeType.java:768)
at org.apache.jackrabbit.core.NodeImpl.getApplicablePropertyDefinition(NodeImpl.java:912)
at org.apache.jackrabbit.core.NodeImpl.getOrCreateProperty(NodeImpl.java:442)
at org.apache.jackrabbit.core.NodeImpl.getOrCreateProperty(NodeImpl.java:376)
at org.apache.jackrabbit.core.NodeImpl.setProperty(NodeImpl.java:2402)
at org.hippoecm.repository.decorating.NodeDecorator.setProperty(NodeDecorator.java:103)
at org.hippoecm.repository.decorating.checked.NodeDecorator.setProperty(NodeDecorator.java:146)
at org.hippoecm.frontend.editor.model.ValueTemplateProvider.addNew(ValueTemplateProvider.java:70)
at org.hippoecm.frontend.editor.plugins.field.PropertyFieldPlugin.newProvider(PropertyFieldPlugin.java:126)
at org.hippoecm.frontend.editor.plugins.field.PropertyFieldPlugin.newProvider(PropertyFieldPlugin.java:47)
at org.hippoecm.frontend.editor.plugins.field.FieldPlugin.updateProvider(FieldPlugin.java:115)
at org.hippoecm.frontend.editor.plugins.field.PropertyFieldPlugin.<init>(PropertyFieldPlugin.java:85)
at sun.reflect.GeneratedConstructorAccessor63.newInstance(Unknown
Source)

NPE:
22.09.2009 16:19:25 ERROR
[org.hippoecm.frontend.JcrObservationManager$JcrListener.process():627]
Error occured when processing event
java.lang.NullPointerException
at org.hippoecm.frontend.plugins.console.browser.BrowserPlugin.onModelChanged(BrowserPlugin.java:93)
at org.apache.wicket.Component.modelChanged(Component.java:2105)
at org.hippoecm.frontend.service.render.AbstractRenderService.onEvent(AbstractRenderService.java:219)
at org.hippoecm.frontend.model.event.ObservableRegistry$ObservationContext.notifyObservers(ObservableRegistry.java:76)
at org.hippoecm.frontend.model.event.JcrEventListener.onEvent(JcrEventListener.java:62)
at org.hippoecm.frontend.JcrObservationManager$JcrListener.process(JcrObservationManager.java:622)
at org.hippoecm.frontend.JcrObservationManager.processEvents(JcrObservationManager.java:822)
at org.hippoecm.frontend.Home.processEvents(Home.java:146)