I dont think many people use lighty and fastcgi these days, you may be
better off switching to NGINX/mongrel or passenger which most people
are doing??
I don't know if lighty will continue being able to run newer versions
of rails forever as it seems to be a die-ing web server, sure you
could probably make it work, but I don't know whether you would want
to.
I don't particularly see why you would want to stay so current with
your rails version whilst using what is considered aging/under
performing deployment method..
Not criticizing just wondering?
Best of luck... I was bummed Lighttpd died too but I moved on.