Does nginx support Chunked POST ?

Now we installed the nginx 0.762 on the redhat 5 server. when the client send the http post request with "Transfer-Encoding:chunked" header, then nginx will stop the forward the request to tomcat server.
i can find the info in the ngix access log file:
[19/Oct/2009:22:46:55 +0800] "POST /mobileserver/action/server.do HTTP/1.1" [b]411[/b] 181 "-" "%E8%81%94%E9%80%9A%E6%8A%A5%E5%88%8A%E4%BA%AD/1.0 CFNetwork/459 Darwin/10.0.0d3"

Thanks in advance!
Kai