Java Null Pointer Excep

Hi all,
Any help would be appreciated. We are getting Java Null pointer exception in our application (error 500) when user clicks on a button to go to a page. WHen user clicks the back button and comes back problem gets resolved. We think upgrading to BeanUtils 1.8.2 will help resolve this. We are currently at 1.6. Can we upgrade to Beanutils 1.8.2 (commons.beanutils.jar) against the code that is compiled using 1.4 and is running in 1.6 JDK. We are using struts 1.1and our we are on WAS7.

Error starts at with BeanUtils.populate is of the following nature:

[3/11/10 16:00:06:787 PST] 0000004e servlet       E com.ibm.ws.webcontainer.servlet.ServletWrapper service SRVE0068E: 
Uncaught exception created in one of the service methods of the servlet action in application 
AutoNB_Auto.03.06.01.00.023.01_20100301_prodSec-xa-cic01-pd02-01AD. 
Exception created : javax.servlet.ServletException: BeanUtils.populate

at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1254)

at org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:821)

at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:254)

at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)

at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:738)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:831)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1455)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1396)

at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:131)

at com.allcorp.premium.infrastructure.filter.RequestContextFilter.doFilter(RequestContextFilter.java:59)

at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:188)

at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:116)

at com.allcorp.premium.security.SecurityServletFilter.doFilter(SecurityServletFilter.java:185)

at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:188)

at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:116)

at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:77)

at com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:852)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:788)

at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:444)

at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:175)

at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:91)

at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:860)

at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1566)

at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:175)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:455)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:384)

at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:272)

at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)

at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)

at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:557)

at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:607)

at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:984)

at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1069)

at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1527)

Caused by: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0

at java.util.ArrayList.RangeCheck(ArrayList.java:547)

at java.util.ArrayList.get(ArrayList.java:322)

at org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUtils.java:521)

at org.apache.commons.beanutils.PropertyUtils.getIndexedProperty(PropertyUtils.java:428)

at org.apache.commons.beanutils.PropertyUtils.getNestedProperty(PropertyUtils.java:750)

at org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.java:801)

at org.apache.commons.beanutils.BeanUtils.setProperty(BeanUtils.java:881)

at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:808)

at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:1252)

... 34 more

[3/11/10 16:00:06:795 PST] 0000004e webapp        E com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E: 
[Servlet Error]-[action]: java.lang.IndexOutOfBoundsException: Index: 0, Size: 0