I have a set of Amazon EC2 servers living behind one of the Amazon elastic load balancers. For some reason one set is reporting a large number of 400 Bad Request messages that appear to originate with the load balancer. Traffic can still come in and out just fine but this is concerning me. Was wondering if anyone has seen this with Nginx or with Amazon cloud stuff before. Cannot seem to find any references to it out there. Mainly, I am trying to nail it down to either a Nginx problem or an Amazon problem so I can get this solved.
I have tried the only mention to 400 error problems which was adding "large_client_header_buffers 4 8k" to my default config file but has not made any difference.

Thanks,
Brian