An "Unexpected Exception" dialog box opened up asking to report the bug and 
give the information below so where you go.  I got it while looking for help on 
jar files.  Here's the relevant info from ide.log


-------------------------------------------------------------------------------
>Log Session: Monday, March 5, 2001 1:21:24 PM EST
>System Info: 
  Product Version          = NetBeans IDE 3.1 (Build 36)
  IDE Versioning           = IDE/1 spec=1.1.2 impl=Build 36
  Operating System         = Windows NT Version 4.0 Running on x86
  Java Version             = 1.3.0
  Java VM Version          = Java HotSpot(TM) Client VM 1.3.0-C
  Java Vendor              = Sun Microsystems Inc.
  Java Vendor URL          = http://java.sun.com/
  Java Home                = C:\jdk1.3\jre
  Java Class Version       = 47.0
  System Locale            = en_US
  JIT                      = unknown or not used
  Home Dir                 = C:\WINNT\Profiles\kevins
  Current Directory        = c:\netbeans
  IDE Home                 = C:\netbeans
  IDE User Home            = C:\netbeans
  System Directory         = C:\netbeans\system
  CLASSPATH                = 
C:\netbeans\lib\patches\corepatch.jar;C:\netbeans\lib\patches\openide-
compat.jar;C:\netbeans\lib\locale\core_ja.jar;C:\netbeans\lib\locale\openide_ja.
jar;C:\netbeans\lib\core.jar;C:\netbeans\lib\openide.jar;C:\netbeans\lib\updater
.jar;C:\netbeans\lib\ext\locale\openidex_ja.jar;C:\netbeans\lib\ext\locale\vcsco
re_ja.jar;C:\netbeans\lib\ext\AbsoluteLayout.jar;C:\netbeans\lib\ext\djava.jar;C
:\netbeans\lib\ext\jaxp.jar;C:\netbeans\lib\ext\jh.jar;C:\netbeans\lib\ext\jpyth
on.jar;C:\netbeans\lib\ext\openidex.jar;C:\netbeans\lib\ext\parser.jar;C:\netbea
ns\lib\ext\regexp.jar;C:\netbeans\lib\ext\servlet.jar;C:\netbeans\lib\ext\vcscor
e.jar;C:\jdk1.3\lib\dt.jar;C:\jdk1.3\lib\tools.jar
-------------------------------------------------------------------------------
[INFO] Loaded modules: org.apache.tools.ant.module (1.2/36); 
org.netbeans.modules.clazz/1 (1.4/36); org.netbeans.modules.html/1 (1.4/36); 
org.netbeans.modules.httpserver/1 (1.4/36); org.netbeans.modules.icebrowser/1 
(1.4/36); org.netbeans.modules.image/1 (1.4/36); 
org.netbeans.modules.properties/1 (1.4/36); org.netbeans.modules.i18n/1 
(1.4/36); org.netbeans.modules.text/1 (1.4/36); 
org.netbeans.modules.usersguide/1 (1.4/36); org.openidex.util/1 (1.4/36); 
org.netbeans.modules.autoupdate/1 (1.4/36); 
org.netbeans.modules.debugger.core/1 (1.1.6.1/36); 
org.netbeans.modules.applet/1 (1.4/36); org.netbeans.modules.debugger.debug/1 
(1.6/36); org.netbeans.modules.debugger.jpda/1 (1.6/36); 
org.netbeans.modules.editor/1 (1.5.0.1/36); org.netbeans.modules.jarpackager/1 
(1.4/36); org.netbeans.modules.java/1 (1.4/36); org.netbeans.modules.beans/1 
(1.4/36); org.netbeans.modules.form/1 (1.4/36); org.netbeans.modules.javadoc/1 
(1.4/36); org.netbeans.modules.objectbrowser/1 (1.4/36); 
org.netbeans.modules.projects/1 (1.4/36); org.netbeans.modules.scripting/1 
(1.1/001); org.netbeans.modules.utilities/1 (1.4/36); 
org.netbeans.modules.vcs.cmdline/1 (1.5/36); org.netbeans.modules.web.core/1 
(1.1.4/36)
path="" :jsp: init
*********** Exception occurred ************
Mon Mar 05 13:27:13 EST 2001java.lang.NullPointerException: null
java.lang.NullPointerException
	at javax.swing.text.html.ParagraphView.paint(ParagraphView.java:202)
	at javax.swing.text.html.TableView.paint(TableView.java:740)
	at javax.swing.text.BoxView.paintChild(BoxView.java:104)
	at javax.swing.text.BoxView.paint(BoxView.java:294)
	at javax.swing.text.html.BlockView.paint(BlockView.java:240)
	at javax.swing.text.BoxView.paintChild(BoxView.java:104)
	at javax.swing.text.BoxView.paint(BoxView.java:294)
	at javax.swing.text.html.BlockView.paint(BlockView.java:240)
	at javax.swing.plaf.basic.BasicTextUI$RootView.paint
(BasicTextUI.java:1170)
	at javax.swing.plaf.basic.BasicTextUI.paintSafely(BasicTextUI.java:523)
	at javax.swing.plaf.basic.BasicTextUI.paint(BasicTextUI.java:657)
	at javax.swing.plaf.basic.BasicTextUI.update(BasicTextUI.java:636)
	at javax.swing.JComponent.paintComponent(JComponent.java:398)
	at javax.swing.JComponent.paint(JComponent.java:739)
	at javax.swing.JComponent.paintChildren(JComponent.java:523)
	at javax.swing.JComponent.paint(JComponent.java:748)
	at javax.swing.JViewport.paintViaBackingStore(JViewport.java:567)
	at javax.swing.JViewport.paint(JViewport.java:709)
	at javax.swing.JComponent.paintWithBuffer(JComponent.java:4393)
	at javax.swing.JComponent._paintImmediately(JComponent.java:4336)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4187)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:370)
	at org.netbeans.core.windows.PinRepaintRM.paintDirtyRegions
(PinRepaintRM.java:75)
	at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run
(SystemEventQueueUtilities.java:205)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:317)
[catch] at java.awt.EventDispatchThread.pumpOneEvent
(EventDispatchThread.java:103)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)