NPE while deleting dynamic web project

-create an empty dynamic web project in JBDS (4.0.0.v201010061543R-H31-Beta1)
-delete it including sources

=> error log says:

java.lang.NullPointerException
at com.metamatrix.modeler.internal.ui.editors.ModelEditorProjectListener.resourceChanged(ModelEditorProjectListener.java:34)
at org.eclipse.core.internal.events.NotificationManager$2.run(NotificationManager.java:291)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.handleEvent(NotificationManager.java:261)
at org.eclipse.core.internal.resources.Workspace.broadcastEvent(Workspace.java:321)
at org.eclipse.core.internal.resources.Resource.broadcastPreDeleteEvent(Resource.java:1993)
at org.eclipse.core.internal.resources.Resource.delete(Resource.java:771)
at org.eclipse.core.internal.resources.Project.delete(Project.java:331)
at org.eclipse.ltk.core.refactoring.resource.DeleteResourceChange.perform(DeleteResourceChange.java:130)
at org.eclipse.ltk.core.refactoring.CompositeChange.perform(CompositeChange.java:278)
at org.eclipse.ltk.core.refactoring.CompositeChange.perform(CompositeChange.java:278)
at org.eclipse.ltk.core.refactoring.PerformChangeOperation$1.run(PerformChangeOperation.java:258)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
at org.eclipse.ltk.core.refactoring.PerformChangeOperation.executeChange(PerformChangeOperation.java:306)
at org.eclipse.ltk.internal.ui.refactoring.UIPerformChangeOperation.executeChange(UIPerformChangeOperation.java:92)
at org.eclipse.ltk.core.refactoring.PerformChangeOperation.run(PerformChangeOperation.java:218)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:1975)
at org.eclipse.ltk.internal.ui.refactoring.WorkbenchRunnableAdapter.run(WorkbenchRunnableAdapter.java:87)
at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)