[ BUILD # : 201003240200 ]
[ JDK VERSION : 1.6.* ]

When I have it enabled this happens:

java.lang.NullPointerException
	at
org.netbeans.modules.editor.lib2.view.EditorBoxView.getViewIndexChecked(EditorBo
xView.java:389)
	at
org.netbeans.modules.editor.lib2.view.EditorView.getViewIndex(EditorView.java:37
2)
	at javax.swing.text.View.getToolTipText(View.java:1010)
	at javax.swing.text.View.getToolTipText(View.java:1016)
	at javax.swing.text.View.getToolTipText(View.java:1016)
	at javax.swing.plaf.basic.BasicTextUI.getToolTipText(BasicTextUI.java:1228)
	at org.netbeans.modules.editor.NbToolTip.buildTip(NbToolTip.java:227)
	at org.netbeans.modules.editor.NbToolTip.buildToolTip(NbToolTip.java:110)
	at
org.netbeans.modules.editor.NbEditorKit$NbBuildToolTipAction.actionPerformed(NbE
ditorKit.java:620)
	at org.netbeans.editor.BaseAction.actionPerformed(BaseAction.java:336)
	at org.openide.awt.AlwaysEnabledAction$1.run(AlwaysEnabledAction.java:137)
	at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:92)
	at
org.openide.util.actions.ActionInvoker.doPerformAction(ActionInvoker.java:113)
	at org.openide.util.actions.ActionInvoker.invokeAction(ActionInvoker.java:96)
	at
org.openide.awt.AlwaysEnabledAction.actionPerformed(AlwaysEnabledAction.java:140
)
	at
org.netbeans.editor.ext.ToolTipSupport.updateToolTip(ToolTipSupport.java:483)
	at
org.netbeans.editor.ext.ToolTipSupport.setToolTipVisible(ToolTipSupport.java:513
)
	at
org.netbeans.editor.ext.ToolTipSupport$Listener.actionPerformed(ToolTipSupport.j
ava:959)
	at
org.netbeans.editor.WeakTimerListener.actionPerformed(WeakTimerListener.java:85)

	at javax.swing.Timer.fireActionPerformed(Timer.java:271)
	at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
	at
org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:133)
	at
java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269
)
	at
java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
	at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174
)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
[catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)