The state of this ticket has been changed to user

Try reading the FAQ, for instance My tunnel goes down after some idletime. My tunnelendpoint also is a NAT/Connection Tracker

I've read the FAQ, as you so elgently tried to imply for me to read via email. What you've quoted is not my issue. My tunnel state is not the issue, nor is my stateful inspection, logs never indicate my tunnel state as fluctuating. I'm running a Cisco 1841 router, this is not an issue with ipchains. I've had this same ipv6 configuration in my router since I first came up, but only recenly been getting notified by your tunnelrobot that there's an issue, even though every time I look, I see my router responding to icmps via ipv6 and the next hop responding to ipv6 icmps, even during the time your tunnel robot says I wasn't. I've got a co-worker setup through sixxs.net on the same pop, and he's been getting emails recently also, and your mrtg graphs show us both not responding to ICMPs at the same time. I do not believe this to be an issue with my router's configuration, but I'll begin logging ipv6 icmp's over time.