Maintainers for nginx are Debian Nginx Maintainers <pkg-nginx-maintainers@alioth-lists.debian.net>.
You may want to refer to the following individual bug pages: libnginx-mod-http-geoip, libnginx-mod-http-image-filter, libnginx-mod-http-perl, libnginx-mod-http-xslt-filter, libnginx-mod-mail, libnginx-mod-stream, libnginx-mod-stream-geoip, nginx-common, nginx-core, nginx-dev, nginx-doc, nginx-extras, nginx-full, nginx-light.
You might like to refer to the nginx package page, or to the Package Tracking System.
If you find a bug not listed here, please report it.