IPv6 and Ruby on Rails

So... how many things will break if I enable IPv6 on my web server?
I assume Mongrel cannot handle IPv6 yet? What about Ruby's CGI
library?

I'm worried things like request_ip are quite likely IPv4 specific
somewhere in the chain...

--Michael

I've run setups with mongrel behind Apache with no issues. YMMV.

-faisal

But WITH IPv6, or only IPv4?

--Michael