I just checked and our servers are all running 9.3.1. I have yet to install 9.3.1 SP1 or SP2 so I think it was the jump from 9.3. to 9.3.1 that did it. I also remember having to update our exported Web Service Handlers because our exposed web server is a Linux OS running Apache/Tomcat but our AGS 9.3.1 for the Java Platform is internal to the firewall running a Windows OS.