Flutterby™! :

I've been looking at various simple RPC systems recently, and I'm starting to compare XML-RPC with (via Camworld) SOAP. Via Scripting News, it turns out that there are some incompatibililties between Microsoft's and IBM's SOAP implementations, on a level which completely blow away the few little glitches (since fixed) that I discovered last time I was playing with XML-RPC. The summary sounds like just what we've come to expect from Microsoft:

"When all is said and done, the Microsoft toolkit currently works very well with SOAP implementations designed specifically around it's envelope encoding quirks and errors. However, this doesn't make the Microsoft toolkit very useful for developers wanting to integrate with existing SOAP implementations on other platforms."