This bug is observed on all platforms viz. Solaris, Win-XP, Linux 7.2 and on metal, GTK, XP and Motif LAF.

Steps To reproduce:
1. Select Table Demo in SwingSet2
2. Click any cell adjacent to the cell containing Image.
3. Type some thing.
4. Now using mouse shift the focus to some other cell.
5. Now type some thing.
6. The newly typed data is still typed in the cell first edited.
7. Now go to the first cell and delete all the content.
8. Now press Tab key. It will throw a NPE.

java.lang.NullPointerException
        at TableDemo$10.getColumnClass(TableDemo.java:481)
        at javax.swing.JTable.getColumnClass(JTable.java:1752)
        at javax.swing.JTable.getCellRenderer(JTable.java:3700)
        at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:1148)
        at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1051)
        at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:974)
        at javax.swing.plaf.ComponentUI.update(ComponentUI.java:142)
        at javax.swing.JComponent.paintComponent(JComponent.java:541)
        at javax.swing.JComponent.paint(JComponent.java:808)
        at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4795)
        at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4748)
        at javax.swing.JComponent._paintImmediately(JComponent.java:4692)
        at javax.swing.JComponent.paintImmediately(JComponent.java:4495)
        at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:410)
        at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUt
lities.java:117)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:20
)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)