NPE: Edit Cell in Window

When looking at table data in the "Data" tab, occasionally when I attempt to edit a cell's data using "Edit Cell in Window" I get a NullPointerException. I've only seen the problem where the cell currently contains a NULL value. I've observed the problem in 6.0.9 and 6.0.10, but 6.0.7 seems to be fine (haven't tried 6.0.8). Here's the stack trace: ====================================== An internal error occurred: Exception: java.lang.NullPointerException java.lang.NullPointerException The error may have affected the application state. Please notify vendor. Stack Trace: java.lang.NullPointerException at com.onseven.dbvis._.u.?(Z:2786) at com.onseven.dbvis._.u.?(Z:298) at com.onseven.dbvis._.u.?(Z:1196) at com.onseven.dbvis._.t.?(Z:3568) at com.onseven.dbvis._.p.?(Z:2099) at com.onseven.dbvis._.K.?(Z:981) at com.onseven.dbvis._.M$2.execute(Z:2714) at se.pureit.swing.xmlactions.DelegateAction.actionPerformed(Z:1129) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1882) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2202) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258) at javax.swing.AbstractButton.doClick(AbstractButton.java:334) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1051) at apple.laf.CUIAquaMenuItem.doClick(CUIAquaMenuItem.java:119) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1092) at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:231) at java.awt.Component.processMouseEvent(Component.java:5602) at javax.swing.JComponent.processMouseEvent(JComponent.java:3135) at java.awt.Component.processEvent(Component.java:5367) at java.awt.Container.processEvent(Container.java:2010) at java.awt.Component.dispatchEventImpl(Component.java:4068) at java.awt.Container.dispatchEventImpl(Container.java:2068) at java.awt.Component.dispatchEvent(Component.java:3903) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4256) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3936) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3866) at java.awt.Container.dispatchEventImpl(Container.java:2054) at java.awt.Window.dispatchEventImpl(Window.java:1791) at java.awt.Component.dispatchEvent(Component.java:3903) at java.awt.EventQueue.dispatchEvent(EventQueue.java:463) at com.onseven.dbvis.I.A.f.dispatchEvent(Z:2787) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:176) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)