Right now i'm setting it to the php strlen($itemxml) which should be returning the length in characters of the XML (i'm using default encoding, so if i'm not mistaken that should be the length of the data in bytes).

I've also tried setting it zero or just hard-coding the count, neither of which worked, which makes me think that i'm not property sending the header at all.

The response header is as follows:

HTTP/1.1 411 Length Required Date: Mon, 06 Nov 2006 20:34:53 GMT Content-Type: text/html Server: GFE/1.3 Content-Length: 1357

I don't know offhand how to get php/cURL to output the headers that it sends, but i'll try and find out. (it's on a remote box, so i can't just sniff it).

Thanks for your time, Tim