I have been using HE Tunnelbroker for a few months now and it is working great.
Until a couple of days ago, the speed was going down an had some connection problems.
So i performed some traceroutes to IPv6 addresses and i noticed a strange difference with traceroutes i did before.
The second hop on the traceroute was always: "kalkoen-4.tunnel.tserv11.ams1.ipv6.he.net" which is OK
But now the second hop is "ghostrider-1.tunnel.tserv11.ams1.ipv6.he.net"
If i do a tracroute to "kalkoen-4.tunnel.tserv11.ams1.ipv6.he.net" I also get that ghostrider name back.
Important to note, my IPv6 connection did still work. But the speed was lower and i couldn't connect to some IPv6 addresses.

I don't know what went wrong, but it looks to me that someone else (ghostrider ?) has taken my tunnel?
I switched over to another tunnel and it is working great again, but if someone could explain what happend thanks!