I've written previously about the problem with DirecWAY which I purchase through their reseller Ground Control. DirecWAY has a problem with their web accelerator that breaks XML-RPC calls between this site and others. Today I found it breaks XML being sent to eBay through the eBay API as well.
The first response I get when I tried to approach them is that the application I'm using must be the problem. Since they don't know that XML-RPC is they figure it must be me. So, here's what I did. Setup a web-proxy that sends web-requests on a port other than port 80. XML-RPC calls work just fine when using the proxy. Switch to port 80 where DirecWAY has Web Accellerator running and see the web surfing speeds remain the same but now all your XML-RPC calls will be truncated.
Sometimes a VAR such as Ground Control can be very helpful in these situations. On the other hand they can do what Ground Control has done and say that well, they're not sure what to do. DirecWAY tells them everything is working correctly. So, of course it is. Neither Ground Control nor DirecWAY seem to understand networking well enough to appreciate the testing that I've done and accept the meaning of those results. I guess it is time to redouble the effort to get DSL out here.