NoSuchMethodError in Client

[cm...@integro.com]

I get the following exeception when trying to run a client application 
with the 11/17 build.  This same application worked under the 1.0 build.


java.lang.NoSuchMethodError: java.lang.StringBuffer: method 
append(Ljava/lang/StringBuffer;)Ljava/lang/StringBuffer; not found
        at 
org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:402)
        at 
org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:122)
        at 
org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:71)
        at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:156)
        at org.apache.axis.SimpleChain.invoke(SimpleChain.java:126)
        at org.apache.axis.client.AxisClient.invoke(AxisClient.java:182)
        at org.apache.axis.client.Call.invokeEngine(Call.java:2376)
        at org.apache.axis.client.Call.invoke(Call.java:2365)
        at org.apache.axis.client.Call.invoke(Call.java:2062)
        at org.apache.axis.client.Call.invoke(Call.java:1986)
        at org.apache.axis.client.Call.invoke(Call.java:1509)
        at 
com.integro.neien.testclients.TestPing.callPing(TestPing.java:77)
        at com.integro.neien.testclients.TestPing.main(TestPing.java:30)
Exception in thread "main" 

Something I need to change in my code or a bug?