Issues with default_type

[James G]

Here's a snippet of my configuration:
location /resource/image/
{
	default_type image/jpeg;
	add_header Content-Type image/jpeg;
	mogilefs_tracker 192.168.0.1:7001;
	mogilefs_domain 'repository:images';

	mogilefs_pass
	{
		proxy_pass $mogilefs_path;
		proxy_hide_header Content-Type;
		proxy_buffering off;
	}
}

So I've set the default type, forced the header with add_header, and  
told the proxy_pass not to send the Content-Type header. So we should  
be getting the Content-Type of "image/jpeg", right?
     $ curl -i http://192.168.0.5/resource/image/af795ed0357e19afcc4a63bbcee1fd10
     HTTP/1.1 200 OK
     Server: nginx/0.7.65
     Date: Tue, 13 Apr 2010 11:09:32 GMT
     Content-Type: text/plain
     Connection: keep-alive
     Content-Length: 25871
     Last-Modified: Tue, 09 Feb 2010 14:56:31 GMT
     Accept-Ranges: bytes

     ????JFIFdd?....

Maybe not. Is this because curl is sending silly accept headers? Well,  
let's ask Wireshark:
     GET /resource/image/af795ed0357e19afcc4a63bbcee1fd10 HTTP/1.1
     User-Agent: curl/7.16.3 (powerpc-apple-darwin9.0) libcurl/7.16.3  
OpenSSL/0.9.7l zlib/1.2.3
     Host: 192.168.0.5
     Accept: */*

Nope. In addtion to this Firefox shows the exact same headers being  
returned by the server. This does appear to be some sort of bug within  
either nginx, or the mogilefs module. At no other point in the  
configuration is add_header, or default_type being set. Even with a  
default_type being set (of application/octet-stream) inside the top  
level of server{} block, the results remain the same.

Is this a bug, and if not, what have I done wrong?

Regards

~ James


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