Just send them a bill for a reasonable amount, say $500 or so. They will know they did something wrong and will either pay or rectify. Stay courteous and don't threaten legal action of the bat. You're likely to make some money.

yet another article that's skeptical of how ready IPv6 is. The amount of brokenness that is there is not very big. Of all the people that have the full Internet (that is IPv4 *and* IPv6) most will simply connect to any IPv6 website without issues.

And apart from the fact that yahoo seems to be a US only thing, and even there is not so relevant anymore, I applaud them doing IPv6, when they get to it. (and after Google, Comcast, Akamai and many others)

I wish we'd get over this "brokenness" story and simply deploy and then fix it for the 1% that has issues. Would be nice if it gets rolled out to the point of 20% traffic in 2011, the year we'll run out of available IPv4 addresses.