After an apt-get upgrade on my Forge box, both php and nginx got upgraded, and while browsing my sites, PHP FPM was being hit by nginx, but it returned nothing, zilch, nada.
Nothing on laravel.log.
Something in the nginx log:
10.10.10.10 - - [23/Sep/2014:11:52:09 -0300] "GET / HTTP/1.1" 200 31 "-" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/37.0.2062.120 Safari/537.36"