Okay, thanks, I'll into that bit more. This is a production machine which, right now, limits me a bit. I is running Ubuntu 10.04 with one of the kernels from Linode. Sometime overnight this weekend, I'll play with it a bit more. I can use other kernels or compile my own, if necessary.

I was hoping what you thought about the AAAA records being added and the appearance of the issue might be helpful as it seems strange. Perhaps a routing problem of some sort when Nginx sent out a reply?

Thanks for you help!

Bret