Problem with pingback. 404 errors in log

I’m having some pingback/trackback issues with 2.0.1 I’ll focus on the pingback for now. It doesn’t seem to work. I’ve tried to get pingbacks from multiple blogs and nothing comes through. Looking at my server logs I do see a 404 error for the xmlrpc.php file. Its strange though, because the file does exist, its current permissions are 755, and I can hit it with a browser, but get the message that it only accepts post requests. Here is the snippet from my log.

72.29.73.51 – – [10/Feb/2006:16:47:54 -0500] “GET /2006/02/sending-a-ping/ HTTP/1.1” 200 6230 “-” “WordPress/2.0.1”
72.29.73.51 – – [10/Feb/2006:16:47:54 -0500] “POST /xmlrpc.php HTTP/1.0” 404 5247 “-” “Incutio XML-RPC — WordPress/2.0.1”
72.29.73.51 – – [10/Feb/2006:16:47:54 -0500] “HEAD /2006/02/sending-a-ping/ HTTP/1.1” 200 0 “-” “WordPress/2.0.1”