After updating Java to version 6 update 15 on Windows Vista (Ultimate, 64-bit), I realized that I had jEdit 4.2 installed and decided to update it to the latest version (4.3pre17) because certain plug-ins weren't working as expected. After installing 4.3pre17, I'm getting the following exception when trying to launch jEdit:

java.lang.ClassCastException: org.gjt.sp.jedit.Buffer cannot be cast to java.awt.Component
	at org.gjt.sp.jedit.View.restoreSplitConfig(View.java:1747)
	at org.gjt.sp.jedit.View.setSplitConfig(View.java:911)
	at org.gjt.sp.jedit.View.(View.java:1356)
	at org.gjt.sp.jedit.jEdit.newView(jEdit.java:2403)
	at org.gjt.sp.jedit.PerspectiveManager$PerspectiveHandler.endElement(PerspectiveManager.java:341)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLNSDTDValidator.endNamespaceScope(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
	at org.gjt.sp.util.XMLUtilities.parseXML(XMLUtilities.java:139)
	at org.gjt.sp.jedit.SettingsXML.load(SettingsXML.java:155)
	at org.gjt.sp.jedit.PerspectiveManager.loadPerspective(PerspectiveManager.java:104)
	at org.gjt.sp.jedit.EditServer.handleClient(EditServer.java:215)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.gjt.sp.jedit.bsh.Reflect.invokeMethod(Reflect.java:134)
	at org.gjt.sp.jedit.bsh.Reflect.invokeStaticMethod(Reflect.java:98)
	at org.gjt.sp.jedit.bsh.Name.invokeMethod(Name.java:871)
	at org.gjt.sp.jedit.bsh.BSHMethodInvocation.eval(BSHMethodInvocation.java:75)
	at org.gjt.sp.jedit.bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:102)
	at org.gjt.sp.jedit.bsh.BSHPrimaryExpression.eval(BSHPrimaryExpression.java:47)
	at org.gjt.sp.jedit.bsh.BSHAssignment.eval(BSHAssignment.java:77)
	at org.gjt.sp.jedit.bsh.Interpreter.eval(Interpreter.java:644)
	at org.gjt.sp.jedit.bsh.Interpreter.eval(Interpreter.java:738)
	at org.gjt.sp.jedit.bsh.Interpreter.eval(Interpreter.java:727)
	at org.gjt.sp.jedit.BeanShellFacade._eval(BeanShellFacade.java:148)
	at org.gjt.sp.jedit.BeanShellFacade.eval(BeanShellFacade.java:113)
	at org.gjt.sp.jedit.BeanShell.eval(BeanShell.java:369)
	at org.gjt.sp.jedit.EditServer$1.run(EditServer.java:343)
	at java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)