@Thomas: Yes, /etc/resolv.conf was simply non-existent before I created
the symlink, at least in Quantal. I unfortunately don't know whether it
was there in Precise and somehow ended up getting removed on upgrade or
was simply never there to begin with (for the reasons that you
mentioned; even if it wasn't there in Precise, DNS still would have
worked, so I wouldn't have noticed). And no, I have no idea why it
wasn't there. :) I didn't do anything that ought to have removed it,
AFAIK!

If the absence of an /etc/resolv.conf file/symlink is widespread, then I
think your warning about a number of bug reports is quite right, unless
something is done to make sure that such a file/link is in place when
Quantal goes official. Now, I suppose it's possible that some unique
quirk happened on my machine to either remove /etc/resolv.conf or
prevent it from being created in the first place, but I think it's
unlikely; I literally had 12.04 on the system for about 3-4 hours at the
most, and I wasn't doing any serious tinkering with it (or much of
anything with it at all), so this was pretty much a vanilla install and
vanilla upgrade. I had Ubuntu Tweak installed from its PPA, but I had
used it to make only some minor cosmetic changes, and I also had the
Faenza icon theme installed from its PPA.

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https://bugs.launchpad.net/bugs/1051348

Title:
  No resolving after upgrade from 12.04 to 12.10 beta

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