The network is pinged, but no web service is running.
VK.com network:
route6: 2a00:bdc0::/36 descr: VKONTAKTE SPb Net origin: AS47541 mnt-by: VKONTAKTE-NET-MNT source: RIPE # Filtered
In the DNS records of VK.com, only one ipv6 - 2a00 appears: bdc0 :: 1
PS Vkontakte! Either enable web services on IPv6, or delete records in DNS AAAA.
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Upd.
Vk.com is already given on ipv6. Fix another ipv6 from userapi.com
Upd2. 10/01/2012
It seems that everything works.