Content-length missing from Nginx headers

[strtwtsn]

Hi

When browsing one of our websites the content-length field header is not
shown, even with gzip turned off.  This causes issues with
chunked_transfer_encoding and kaspersky av.

How can we get the content-length to show?

This is a ruby on rails app using passenger.

Thanks

Stuart

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,261476,261476#msg-261476