To reproduce:

1. Load data for A. Thaliana TAIR 10 mRNA
2. Right click on the track and select 'Track Operation' -> 'Depth' to create a graph
3. Float this depth graph and go back to DMT
4. Observe that the DMT is not showing anything and Exceptions encountered:

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: com.affymetrix.igb.shared.GraphGlyph cannot be cast to com.affymetrix.igb.shared.TierGlyph
at com.affymetrix.igb.view.load.DataManagementTableModel.isCellEditable(DataManagementTableModel.java:260)
at javax.swing.JTable.isCellEditable(JTable.java:2734)
at com.affymetrix.igb.shared.StyledJTable.setComponentBackground(StyledJTable.java:117)
at com.affymetrix.igb.shared.StyledJTable.prepareRenderer(StyledJTable.java:104)
at com.jidesoft.plaf.basic.BasicJideTableUIDelegate.paintCell(Unknown Source)
at com.jidesoft.plaf.basic.BasicJideTableUIDelegate.a(Unknown Source)
at com.jidesoft.plaf.basic.BasicJideTableUIDelegate.paint(Unknown Source)
at com.jidesoft.plaf.basic.BasicJideTableUI.paint(Unknown Source)
at javax.swing.plaf.ComponentUI.update(ComponentUI.java:153)
at javax.swing.JComponent.paintComponent(JComponent.java:760)
at javax.swing.JComponent.paint(JComponent.java:1037)
at javax.swing.JComponent.paintChildren(JComponent.java:870)
at javax.swing.JComponent.paint(JComponent.java:1046)
at javax.swing.JViewport.paint(JViewport.java:795)
at javax.swing.JComponent.paintChildren(JComponent.java:870)
at javax.swing.JComponent.paint(JComponent.java:1046)
at javax.swing.JComponent.paintChildren(JComponent.java:870)
at javax.swing.JComponent.paint(JComponent.java:1046)
at javax.swing.JComponent.paintChildren(JComponent.java:870)
at javax.swing.JSplitPane.paintChildren(JSplitPane.java:1030)
at javax.swing.JComponent.paint(JComponent.java:1046)
at javax.swing.JComponent.paintChildren(JComponent.java:870)
at javax.swing.JComponent.paint(JComponent.java:1046)
at javax.swing.JComponent.paintChildren(JComponent.java:870)
at javax.swing.JComponent.paint(JComponent.java:1046)
at javax.swing.JComponent.paintChildren(JComponent.java:870)
at javax.swing.JSplitPane.paintChildren(JSplitPane.java:1030)
at javax.swing.JComponent.paint(JComponent.java:1046)
at javax.swing.JComponent._paintImmediately(JComponent.java:5106)
at javax.swing.JComponent.paintImmediately(JComponent.java:4890)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:812)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:714)
at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:694)
at javax.swing.RepaintManager.access$700(RepaintManager.java:41)
at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1672)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:702)
at java.awt.EventQueue.access$400(EventQueue.java:82)
at java.awt.EventQueue$2.run(EventQueue.java:663)
at java.awt.EventQueue$2.run(EventQueue.java:661)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:672)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)