Bug#407511: apt: Wrong value for APT::Default-Release may cause unwanted upgrades

[Alain Kalker <miki@dds.nl>]

Thanks for the info. I sure hope that this problem gets more attention,
but I'm hoping for more than just documentation changes. About a week
after Etch release, my system _again_ got upgraded halfway to Sid
because I happened to update in the middle of my mirror's repository
switchover.
I've become used to (and have great admiration for) apt's way of warning
about proposed changes that may possibly have major consequences for the
entire system, but sadly it seems this hasn't been integrated yet into
other tools like update-notifier and synaptic.