save problems, errors and exceptions

I am having a problem. Each time I post an edit to a page I get

-- 

    HTTP ERROR: 403 Forbidden

RequestURI=/error.jsp

/Powered by Jetty:// <http://jetty.mortbay.org>

/

However the page still saves. In the server log I get

java.lang.ArrayIndexOutOfBoundsException: 10 >= 9
at java.util.Vector.elementAt(Vector.java:432)
at org.apache.lucene.index.FieldInfos.fieldInfo(Unknown Source)
at org.apache.lucene.index.FieldsReader.doc(Unknown Source)
at org.apache.lucene.index.SegmentReader.document(Unknown Source)
at org.apache.lucene.index.SegmentMerger.mergeFields(Unknown Source)
at org.apache.lucene.index.SegmentMerger.merge(Unknown Source)
at org.apache.lucene.index.IndexWriter.mergeSegments(Unknown Source)
at org.apache.lucene.index.IndexWriter.optimize(Unknown Source)
at org.snipsnap.snip.SnipIndexer.index(SnipIndexer.java:144)
at org.snipsnap.snip.SnipIndexer.reIndex(SnipIndexer.java:115)
at org.snipsnap.snip.SnipSpaceImpl.systemStore(SnipSpaceImpl.java:327)
at org.snipsnap.snip.SnipSpaceImpl.store(SnipSpaceImpl.java:307)
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:585)
at org.codehaus.nanning.Mixin$InvocationImpl.invokeNext(Mixin.java:119)
at org.codehaus.nanning.Mixin.invokeMethod(Mixin.java:194)
at org.codehaus.nanning.AspectInstance.invoke(AspectInstance.java:88)
at $Proxy5.store(Unknown Source)
at org.snipsnap.net.SnipStoreServlet.doPost(SnipStoreServlet.java:143)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:356)
at 
org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:342)
at org.snipsnap.net.filter.InitFilter.doFilter(InitFilter.java:358)
at 
org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:334)
at org.snipsnap.net.filter.GZIPFilter.doFilter(GZIPFilter.java:35)
at 
org.mortbay.jetty.servlet.WebApplicationHandler$Chain.doFilter(WebApplicationHandler.java:334)
at 
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:286)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1808)
at 
org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:525)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1758)
at org.mortbay.http.HttpServer.service(HttpServer.java:879)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:790)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:952)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:807)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:197)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:289)
at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:496)

help please!

regards
gary
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Dr Gary Thompson
Astbury Centre for Structural Molecular Biology,
University of Leeds, Astbury Building,
Leeds, LS2 9JT, West-Yorkshire, UK Tel. +44-113-3433024
email: garyt <at> bmb.leeds.ac.uk Fax +44-113-2331407
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