Found one Java-level deadlock:
=============================
"AWT-EventQueue-1":
  waiting to lock monitor 0x080de7cc (object 0x9ed55000, a java.util.HashMap),
  which is held by "Default RequestProcessor"
"Default RequestProcessor":
  waiting to lock monitor 0x080de9c0 (object 0x92cfe450, a java.lang.Class),
  which is held by "AWT-EventQueue-1"

Java stack information for the threads listed above:
===================================================
"AWT-EventQueue-1":
	at org.netbeans.modules.editor.impl.KitsTracker.getMimeTypesForKitClass(KitsTracker.java:62)
	- waiting to lock <0x9ed55000> (a java.util.HashMap)
	at org.netbeans.modules.editor.NbEditorSettingsInitializer.updateSettingsMap(NbEditorSettingsInitializer.java:110)
	at org.netbeans.editor.Settings.getKitMap(Settings.java:626)
	at org.netbeans.editor.Settings.getValue(Settings.java:330)
	- locked <0x92cfe450> (a java.lang.Class for org.netbeans.editor.Settings)
	at org.netbeans.editor.Settings.getValue(Settings.java:314)
	at org.netbeans.modules.editor.options.OptionSupport.getSettingValue(OptionSupport.java:99)
	at org.netbeans.modules.editor.options.BaseOptions.getSettingValue(BaseOptions.java:1814)
	at org.netbeans.modules.editor.options.OptionSupport.getSettingBoolean(OptionSupport.java:106)
	at org.netbeans.modules.editor.options.BaseOptions.isToolbarVisible(BaseOptions.java:1426)
	at org.netbeans.modules.editor.options.AllOptionsFolder.isToolbarVisible(AllOptionsFolder.java:264)
	at org.netbeans.modules.editor.MainMenuAction$ShowToolBarAction.setMenu(MainMenuAction.java:258)
	at org.netbeans.modules.editor.MainMenuAction.resultChanged(MainMenuAction.java:87)
	at org.openide.util.lookup.SimpleProxyLookup.checkLookup(SimpleProxyLookup.java:89)
	at org.openide.util.lookup.SimpleProxyLookup.lookup(SimpleProxyLookup.java:130)
	at org.netbeans.modules.openide.windows.GlobalActionContextImpl.propertyChange(GlobalActionContextImpl.java:96)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
	at org.netbeans.core.windows.RegistryImpl.doFirePropertyChange(RegistryImpl.java:264)
	at org.netbeans.core.windows.RegistryImpl.access$100(RegistryImpl.java:40)
	at org.netbeans.core.windows.RegistryImpl$1.run(RegistryImpl.java:138)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:595)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:258)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
"Default RequestProcessor":
	at org.netbeans.editor.Settings.setValue(Settings.java:422)
	- waiting to lock <0x92cfe450> (a java.lang.Class for org.netbeans.editor.Settings)
	at org.netbeans.modules.gsf.GsfEditorKitFactory$GsfEditorKit.<init>(GsfEditorKitFactory.java:166)
	at org.netbeans.modules.gsf.GsfEditorKitFactory.kit(GsfEditorKitFactory.java:135)
	at org.netbeans.modules.gsf.MimeLookupInitializerImpl$1.convert(MimeLookupInitializerImpl.java:117)
	at org.openide.util.lookup.InstanceContent$ConvertingItem.getInstance(InstanceContent.java:266)
	- locked <0x9edc30f0> (a org.openide.util.lookup.InstanceContent$ConvertingItem)
	at org.openide.util.lookup.SimpleLookup.lookup(SimpleLookup.java:78)
	at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:192)
	at org.netbeans.modules.editor.impl.KitsTracker.reload(KitsTracker.java:167)
	at org.netbeans.modules.editor.impl.KitsTracker.getMimeTypesForKitClass(KitsTracker.java:63)
	- locked <0x9ed55000> (a java.util.HashMap)
	at org.netbeans.modules.editor.impl.KitsTracker.findMimeType(KitsTracker.java:87)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.netbeans.editor.BaseKit.kitsTracker_FindMimeType(BaseKit.java:439)
	at org.netbeans.editor.BaseKit.getKit(BaseKit.java:400)
	at org.netbeans.modules.java.editor.JavaEditorWarmUpTask.run(JavaEditorWarmUpTask.java:118)
	at org.netbeans.core.WarmUpSupport.run(WarmUpSupport.java:85)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:541)
	at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:963)

Found 1 deadlock.