I don't know when the http proxy started rejecting ipv6 requests but I first noticed it in 7.890 and its still broke in 7.891. Only way to surf using a tunnel broker is to have a allow--http--anyIPv6 rule for IPv6 traffic in packet filter rules.
Believe me, the transparent mode is basically just a netfilter rule that is redirecting your traffic through the http-proxy. And since the IPv6 protocol doesn't know the concept of NAT (it was introduced to get rid of NAT and all it's inherent problems), we do not have a IPv6 equivalent for the transparent mode (yet).
"Fixing" is not the right word here. It's more like a missing feature.
Believe me, the transparent mode is basically just a netfilter rule that is redirecting your traffic through the http-proxy. And since the IPv6 protocol doesn't know the concept of NAT (it was introduced to get rid of NAT and all it's inherent problems), we do not have a IPv6 equivalent for the transparent mode (yet).
"Fixing" is not the right word here. It's more like a missing feature.