I'm having issues getting my HE IPv6 tunnel working with my cleints.  I've got the router all setup and everything works from the router.  Even the clients are getting issued IPv6 addresses, but it's apparently not routing the connections.  In linux on my wifi I noticed it kept dropping out after about 2 minutes and reconnecting unless I turned off IPv6 support in NetworkManager.  With IPv6 enabled I get the following from syslog:

Jan 16 12:06:03 cpsmobilelin NetworkManager[931]: <info> DNS: starting dnsmasq...Jan 16 12:06:03 cpsmobilelin NetworkManager[931]: <warn> Failed to add route Object not foundJan 16 12:06:03 cpsmobilelin NetworkManager[931]: <warn> Failed to add route Object not foundJan 16 12:06:03 cpsmobilelin NetworkManager[931]: <error> [1326733563.97999] [nm-system.c:602] nm_system_apply_ip6_config(): (wlan0): failed to set IPv6 route: Object not foundJan 16 12:06:03 cpsmobilelin NetworkManager[931]: <warn> Failed to add route Object not foundJan 16 12:06:03 cpsmobilelin NetworkManager[931]: <warn> Failed to add route Object not foundJan 16 12:06:03 cpsmobilelin NetworkManager[931]: <error> [1326733563.98393] [nm-system.c:602] nm_system_apply_ip6_config(): (wlan0): failed to set IPv6 route: Object not foundJan 16 12:06:03 cpsmobilelin NetworkManager[931]: <info> DNS: starting dnsmasq...Jan 16 12:06:03 cpsmobilelin NetworkManager[931]: <info> Policy set 'NAME' (wlan0) as default for IPv4 routing and DNS.Jan 16 12:06:03 cpsmobilelin NetworkManager[931]: <warn> Failed to add route Object existsJan 16 12:06:03 cpsmobilelin NetworkManager[931]: <info> Policy set 'NAME' (wlan0) as default for IPv6 routing and DNS.Jan 16 12:06:03 cpsmobilelin dnsmasq[2681]: started, version 2.59 cache disabledJan 16 12:06:03 cpsmobilelin dnsmasq[2681]: compile time options: IPv6 GNU-getopt DBus i18n DHCP TFTP conntrack IDNJan 16 12:06:03 cpsmobilelin dnsmasq[2681]: using nameserver 2001:***:*:***::1#53Jan 16 12:06:03 cpsmobilelin dnsmasq[2681]: using nameserver 192.168.1.1#53Jan 16 12:06:03 cpsmobilelin dnsmasq[2681]: read /etc/hosts - 7 addresses

It appears when NetworkManager attempts to setup the IPv6 connection it fails to route and then dnsmasq crashes causing it disconnect then reconnect.