Curious ClassCastException in Coverage Explorer

java.lang.ClassCastException: com.cenqua.clover.eclipse.views.nodes.LeafPackageFragmentNode cannot be cast to org.eclipse.jdt.core.IJavaElement
at org.eclipse.jdt.internal.ui.JavaTaskListAdapter.getAffectedResource(JavaTaskListAdapter.java:28)
at org.eclipse.ui.views.markers.internal.MarkerView.focusSelectionChanged(MarkerView.java:1131)
at org.eclipse.ui.views.markers.internal.MarkerView$2.selectionChanged(MarkerView.java:482)
at org.eclipse.ui.internal.AbstractSelectionService.fireSelection(AbstractSelectionService.java:156)
at org.eclipse.ui.internal.AbstractSelectionService$1.selectionChanged(AbstractSelectionService.java:62)
at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:162)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
at org.eclipse.core.runtime.Platform.run(Platform.java:843)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:149)
at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:160)
at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:1976)
at org.eclipse.jface.viewers.StructuredViewer.handleSelect(StructuredViewer.java:1128)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(StructuredViewer.java:1154)
at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(OpenStrategy.java:213)
at org.eclipse.jface.util.OpenStrategy.access$3(OpenStrategy.java:207)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:374)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:928)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3348)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2968)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1930)