Lighttpd

If mod_deflate support patch is applied (http://redmine.lighttpd.net/attachments/632/lighttpd-1.4.19.mod_deflate.patch) transfer chunked encoding will be broken in mod_cgi even if mod_deflate is disabled.

Steps to reproduce.
Write simple cgi script:

#!/usr/bin/perl
use CGI
print CGI::header();
print "hello world";

When you try curl http://localhost/cgi-test.pl you will receive "(18) transfer closed with outstanding read data remaining" because there is no last zero size chunk in the response.

There are no problems with HTTP/1.0 because chunked transfer encoding is not used.