On second thoughts...I seem to have been confused by the 'no AAAA records for fastly.net' (as a DNS-purist: that should have said "ns[1234].fastly.net" instead, to make it relevant). ;-)
I ran into this some time ago with deb.debian.org
Right. So please ignore:
Just for the record; your issue is slightly different: You wrote:"deb.debian.org is a CNAME for debian.map.fastly.net. There are no AAAA records for fastly.net so any DNS querys from an IPv6 only resolver will not work."
-- Marco
