> nginx -V
nginx: nginx version: nginx/1.0.5
nginx: TLS SNI support enabled
nginx: configure arguments: --prefix=/etc/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-log-path=/var/log/nginx/access.log --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --lock-path=/var/lock/nginx.lock --pid-path=/var/run/nginx.pid --with-debug --with-http_addition_module --with-http_dav_module --with-http_geoip_module --with-http_gzip_static_module --with-http_image_filter_module --with-http_realip_module --with-http_stub_status_module --with-http_ssl_module --with-http_sub_module --with-http_xslt_module --with-ipv6 --with-sha1=/usr/include/openssl --with-md5=/usr/include/openssl --with-mail --with-mail_ssl_module --add-module=/build/buildd/nginx-1.0.5/debian/modules/nginx-echo --add-module=/build/buildd/nginx-1.0.5/debian/modules/nginx-upstream-fair

Logs: http://pastebin.com/W4Tf0vcF

Here is a summary again:

Details:
System: Ubuntu 11.10, Play 1.2.4 unzipped and installed, Nginx 1.0.5
via apt-get
Network: www.myApp.com points to a static IP, which is a modem/router
with LAN address 192.168.1.1 wired to my box 192.168.1.13. The router
uses the NAT rule "forward port 80 to 192.168.1.13" (my box)
Note that local access (http://localhost:9027) works fine in all cases
Case 1: WORKS vanilla "play new myApp" works fine at http://localhost:9027
Case 2: FAIL vanilla "play new myApp" times out at http://www.myApp.com,
nothing received by browser
Case 3: WORKS hacked index.html with short toy css, works via www.myApp.com
Case 4: FAIL Case 3 with lengthened css, long delay via www.myApp.com,
css not used
Case 5: WORKS Case 4 but with nginx "proxy_buffering off;", works via
www.myApp.com
Case 6: FAIL Case 5 with an extra css comment line, long delay via
www.myApp.com, css not used