Just posted this on the nginx-en google group but wasn't sure the best place to post so i'm dup'ng here:

Not sure if this is nginx's problem or debian's. I've never used
nginx before so I'm pretty new to the whole thing, but I thought I'd
play around with it on a debian 'testing' machine for fun. I
installed it with a normal `aptitude install nginx`

When I try to run it however I Get this:

admin@myhost:~$ sudo /etc/init.d/nginx start
Starting nginx: the configuration file /etc/nginx/nginx.conf syntax is
ok
[emerg]: socket() [::]:80 failed (97: Address family not supported by
protocol)
configuration file /etc/nginx/nginx.conf test failed

I actually tried using Debian Lenny earlier with a backport to this
version and the same thing happened. Can someone tell me what's going
on?