[ BUILD # : 200409081800 ]
[ JDK VERSION : J2SE 1.5.0 ]

I don't really know where this comes from. I had a NB3.6 version installed and removed it once when I had the feeling that 4.0 is working for me. But right after that I got exceptions during start up and now I got one starting the setup wizard. The whole IDE is frozen and I have to kill it. The buttons in the Exception window do nothing. --> See screen shot.

The following Exception could be found in the log:

Annotation: Exception occurred in Request Processor
java.lang.IllegalStateException: Duplicate pair in treePair1: SL[/Browsers/SwingBrowser pair2: SL[/Browsers/SwingBrowser index1: 6 index2: 6 item1: org.netbeans.core.ui.SwingBrowser@1de3994 item2: org.netbeans.core.ui.SwingBrowser@1de3994 id1: 13e6226 id2: 1107c05
	at org.openide.util.lookup.ALPairComparator.compare(ALPairComparator.java:52)
	at java.util.TreeMap.compare(TreeMap.java:1093)
	at java.util.TreeMap.put(TreeMap.java:465)
	at java.util.TreeSet.add(TreeSet.java:210)
	at org.openide.util.lookup.AbstractLookup$R.initItems(AbstractLookup.java:788)
	at org.openide.util.lookup.AbstractLookup$R.allItemsWithoutBeforeLookup(AbstractLookup.java:749)
	at org.openide.util.lookup.AbstractLookup$R.allItems(AbstractLookup.java:735)
	at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:384)
	at org.openide.util.lookup.ProxyLookup$R.allItems(ProxyLookup.java:345)
	at org.openide.util.lookup.ProxyLookup$R.computeResult(ProxyLookup.java:384)
	at org.openide.util.lookup.ProxyLookup$R.allItems(ProxyLookup.java:345)
	at org.netbeans.beaninfo.editors.HtmlBrowser$FactoryEditor.getTags(HtmlBrowser.java:107)
	at org.netbeans.core.ui.IDESettingsPanel$AsyncGUIJobImpl.construct(IDESettingsPanel.java:495)
	at org.openide.util.AsyncInitSupport.run(AsyncInitSupport.java:136)
	at org.openide.util.Task.run(Task.java:136)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:330)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:686)