When this goes out, the upgrading.txt file should include the following:

==========
If you are using the xml-rpc interface, there is a change
in accessing it. You can not send text/xml data to any
roundup url and get a response, you must use the /xmlrpc
url. For example, if you used to send your xmlrpc request to:

   http://myroundup.com/roundup

you need to change the url to read:

   http://myroundup.com/roundup/xmlrpc

to invoke the xmlrpc handler. This allows us to send xml
data to roundup for other handlers (e.g. REST, SOAP ...)
in the future.