Making a call to javax.swing.table.DefaultTableModel.InsertRow(row,nullVector) with a null vector or null object[] causes an Exception to thrown from getValueAt() method. Bug similar to this one: 4191160 Suggested fix makes my problems disappear.

Exception occurred during event dispatching:
java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
at java.util.Vector.elementAt(Vector.java:445)
at javax.swing.table.DefaultTableModel.getValueAt(DefaultTableModel.java:673)
at javax.swing.JTable.getValueAt(JTable.java:1714)
at javax.swing.JTable.prepareRenderer(JTable.java:3530)