I'm having a similar problem. Everything works great and I receive a 200 response code when I retrieve entries using GET. However, when I change the request method to POST I began to receive a 500 response code.

I'm using php 4.3.10 (and I also tried 5.0.1) and curl 7.10.6.

Here's the result when I use POST:

Array ( [url] => https://www.blogger.com/atom/11341374 [content_type] => application/xml; charset=utf-8 [http_code] => 500 [header_size] => 528 [request_size] => 517 [filetime] => -1 [ssl_verify_result] => 0 [redirect_count] => 0 [total_time] => 0.422 [namelookup_time] => 0.008 [connect_time] => 0.069 [pretransfer_time] => 0.322 [size_upload] => 0 [size_download] => 58 [speed_download] => 137.44075829384 [speed_upload] => 0 [download_content_length] => 58 [upload_content_length] => 0 [starttransfer_time] => 0.421 [redirect_time] => 0 )

I'm stumped for now...but I'm going to try some more tonight. If anyone has had a similar problem and fixed it then I'd appreciate some input. Else I'll figure it out and post back here.

Thanks