Thanks everyone that commented on this - believe it or not you set me on
the right track.
There were two issues - one that it seems that the curl_setopt
CURLOPT_HTTPHEADER was being overwritten by the later curl_setopt($ch,
CURLOPT_POST, 1), so my data was still being sent as form-encoded, thus
the receiving page found nothing in $HTTP_RAW_POST_DATA.
The other problem was a bit more subtle, so thanks Daniel for making me
look a bit closer. I'd got some options set on my TCP logger to only
monitor xml traffic, so the form encoded data wasn't getting through!
Tom

>> On Wed, 1 Dec 2004, Tom wrote:
>>
>>> Sadly I'm not certain what it does do.
>>
>>
>>
>> Then figure it out!
>>
>> Either you send the POST to a server/script that can show everything,
>> or you ethereal the network and capture the http traffic.
>>
>
>
>
Received on 2004-12-01