java.lang.NullPointerException
   at javax.swing.text.html.StyleSheet.removeHTMLTags(StyleSheet.java:695)
   at javax.swing.text.html.StyleSheet.addAttributes(StyleSheet.java:593)
   at javax.swing.text.StyleContext$NamedStyle.addAttributes(StyleContext.java:1513)
   at javax.swing.text.html.HTMLEditorKit.createInputAttributes(HTMLEditorKit.java:452)
   at javax.swing.text.StyledEditorKit$AttributeTracker.updateInputAttributes(StyledEditorKit.java:259)
   at javax.swing.text.StyledEditorKit.install(StyledEditorKit.java:117)
   at javax.swing.text.html.HTMLEditorKit.install(HTMLEditorKit.java:338)
   at javax.swing.JEditorPane.setEditorKit(JEditorPane.java:1057)
   at javax.swing.JEditorPane.setContentType(JEditorPane.java:981)
   at org.netbeans.modules.collab.channel.chat.ChatInputPane._setContentType(ChatInputPane.java:223)
   at org.netbeans.modules.collab.channel.chat.ChatComponent.setInputContentType(ChatComponent.java:660)
   at org.netbeans.modules.collab.channel.chat.ChatComponent$ContentTypeActionListener.actionPerformed(ChatComponent.java:1287)
   at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
   at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
   at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
   at javax.swing.JToggleButton$ToggleButtonModel.setPressed(JToggleButton.java:308)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
   at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
   at java.awt.Component.processMouseEvent(Component.java:6505)
   at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
   at java.awt.Component.processEvent(Component.java:6270)
   at java.awt.Container.processEvent(Container.java:2229)
   at java.awt.Component.dispatchEventImpl(Component.java:4861)
   at java.awt.Container.dispatchEventImpl(Container.java:2287)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.LightweightDispatcher.retargetMouseEvent(LightweightDispatcher.java:4832)
   at java.awt.LightweightDispatcher.processMouseEvent(LightweightDispatcher.java:4492)
   at java.awt.LightweightDispatcher.dispatchEvent(LightweightDispatcher.java:4422)
   at java.awt.Container.dispatchEventImpl(Container.java:2273)
   at java.awt.Window.dispatchEventImpl(Window.java:2713)
   at java.awt.Component.dispatchEvent(Component.java:4687)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:707)
   at java.awt.EventQueue.access$000(EventQueue.java:101)
   at java.awt.EventQueue$3.run(EventQueue.java:666)
   at java.awt.EventQueue$3.run(EventQueue.java:664)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
   at java.awt.EventQueue$4.run(EventQueue.java:680)
   at java.awt.EventQueue$4.run(EventQueue.java:678)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:677)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:162)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:90)