ArrayIndexOutOfBoundsException when adding issue type scheme.

When trying to confirm changes, using save button, on "Add Issue Types Scheme" screen, server has logged following problem, blocking flow control on that screen:

java.lang.ArrayIndexOutOfBoundsException: 4096
at org.apache.coyote.http11.InternalOutputBuffer.write(InternalOutputBuffer.java:688)
at org.apache.coyote.http11.InternalOutputBuffer.sendStatus(InternalOutputBuffer.java:428)
at org.apache.coyote.http11.Http11Processor.prepareResponse(Http11Processor.java:1531)
at org.apache.coyote.http11.Http11Processor.action(Http11Processor.java:892)
at org.apache.coyote.Response.action(Response.java:180)
at org.apache.coyote.http11.InternalOutputBuffer.endRequest(InternalOutputBuffer.java:388)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:836)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)

This happens only on JBoss 3.2.6 / Tomcat 5.0.28. With JBoss 4.0.2 / Tomcat 5.5 everything is fine.
My problems is that production environment is still JBoss 3.2.6 and upgrading is unpredicted effort... first thing that comes to mind is to upgrade tomcat sar
to newer version. Did you noticed problem mentioned above and have any workarounds?

regards,
andy