Web Proxy Server Compatibility Issues

Release 5U1 Web Proxy Server does not introduce any new public interfaces and is backwardly compatible with Release 4 and Release 51 Web Proxy Server. Release 5U1 Web Proxy Server is also compatible with release 3.6, except that plug-ins developed using the NSAPI interface supported by release 3.6 must be recompiled with the NSAPI interface supported by Release 5U1.