To start with, there's no IPv6 for http://ipv6test.google.com/
Check this: http://paste.userlinux.net/62/
Edit: previous link shows that I have IPv6 connectivity and Google test page is wrong.
Check this: http://paste.userlinux.net/62/
Edit: previous link shows that I have IPv6 connectivity and Google test page is wrong.
I believe their message is incorrect. It should be "Your system is not using IPv6 connection by default OR you don't have it."
Also, the IPv6 is available on <random>.ds.ipv6test.google.com, which is what they use to check your conectivity.
Honestly, I don't see how are they testing if I have an IPv6 address when their web it's not accessible using IPv6. I can be wrong, though :)
Edit: OK, point for you. Although the system tries IPv6 first, may be Firefox is using IPv4 for that page because there's no IPv6 on ipv6test.google.com.
But I still think it's wrong because they're doing false negatives.
I think they are detecting via Ajax to an ipv6 only domain so the test page does not need ipv6.
So it must be misdetecting you. It was being intermittent for me earlier...