(usagi-users 03623) IPv6 multicast socket specific binding bug

Hello,

Using IPv6 multicast under linux, i would like to know
if this issues could be fixed :

G is a multicast address. I have two sockets, S1 and S2 bound 
respectively to *,P and G,P. On socket S1, didn't join any group, 
on the socket S2, i joined G using system setsockopt.

It could seems quite natural that when a packet arrive 
on the system with destination G,P, it is delivered to both sockets
but, as S1 didn't join the group explicitly, wouldn't be more
logical that the packet is delivered only to the socket where
I mentionned explictly that i joined the group ?

Thanks,

Hoerdt Mickael