startup error -> "[emerg] duplicate listen options" if 2nd IPv6 listener is enabled

[pgn]

I run src-built nginx/1.3.2 on linux/64.

I have two nginx vhosts enabled:
	site 1)
		...
		server {
			server_name test1.loc;
			listen      10.0.0.1:443;
			listen      [2001:xxx:xxxx:xxx::1]:443 ipv6only=on;
		...

	site 2)
		...
		server {
			server_name test2.loc;
			listen      10.0.0.1:443 default;
		#	listen      [2001:xxx:xxxx:xxx::1]:443 ipv6only=on;
		...[code]

With this config, if I start nginx,

	service nginx start
		Shutting down nginx                done
		Starting nginx                     done

all's well.

But, if for site 2) I enable the IPv6 listener,

	-	#	listen      [2001:xxx:xxxx:xxx::1]:443 ipv6only=on;
	+		listen      [2001:xxx:xxxx:xxx::1]:443 ipv6only=on;


Now, @ nginx start,

	service nginx start
		Starting nginx nginx: [emerg] duplicate listen options for
[2001:xxx:xxxx:xxx::1]:443 in
/usr/local/etc/nginx/sites-enabled/test2.loc.conf:21
		startproc:  exit status of parent of /usr/local/sbin/nginx: 1
                                                                        
                                 failed


Is this a bug, feature or config problem?

Thanks.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,228250,228250#msg-228250