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> MacOS X caching behaviour turned out to be very interesting. I posted \ > something about that yesterday, but it seems to be deeper than that. > > It's as if OS X will just ignore AAAA responses if they don't come back \ > quickly enough, and thus you 'lock' into IPv4 if the A response arrives \ > quickly. I need to rig up some tests, but if anyone has looked in detail \ > at that already and has the info, it would be appreciated. Is it this? There was earlier stuff on the ClueNet list which described the behaviour in detail (or had a link to sucha description) but I can't find it just now. <http://lists.cluenet.de/pipermail/ipv6-ops/2010-September/003935.html> Sam -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.