We have been testing forth and back, ipv6 is working fine at my side 
(that is, connecting to ipv6 sites).
Egbert can ping my ipv6 monowall addresses... so we're a little closer 
to the finish.

But because time is catching up on us (and I still have to go and walk 
the dog), I need to go to sleep for today... it's been so far a 
fascinating journey into IPv6.

I'll be back for some more testing tomorrow... Steve, if you have still 
some time left to test (but I'm not going to fiddle any longer today), 
http://ipv6.mcmc.be should be pointing to my Vista box (that I leave on 
for about 10 ~ 15 minutes : the time for a dogs walk that is - LOL)

Kind regards, and many thanks for helping me this far already both of you.
Michel