下面是自 0.7.26 版本后的变化：
*) Bugfix: a segmentation fault occurred in worker process, if variables were used in the "fastcgi_pass" and "proxy_pass"
directives and host name must be resolved; the bug had appeared in 0.7.29.
*) Bugfix: the "fastcgi_pass" and "proxy_pass" directives did not support variables if unix domain sockets were used.
*) Bugfixes in subrequest processing; the bugs had appeared in 0.7.25.
*) Bugfix: a "100 Continue" response was issued for HTTP/1.0 requests;
*) Bugfix: in memory allocation in the ngx_http_gzip_filter_module on Cygwin.
*) Change: in memory allocation in the ngx_http_gzip_filter_module.
*) Change: the default "gzip_buffers" directive values have been changed to 32 4k or 16 8k from 4 4k/8k.
*) Feature: the "try_files" directive.
*) Feature: variables support in the "fastcgi_pass" directive.
*) Feature: now the $geo variable may get an address from a variable.
*) Feature: now a location's modifier may be used without space before name.
*) Feature: the $upstream_response_length variable.
*) Bugfix: now a "add_header" directive does not add an empty value.
*) Bugfix: if zero length static file was requested, then nginx just closed connection; the bug had appeared in 0.7.25.
*) Bugfix: a MOVE method could not move file in non-existent directory.
*) Bugfix: a segmentation fault occurred in worker process, if no one named location was defined in server, but some one was used in an error_page directive.