Bug#400768: apt-0.7.15~exp2: Improvement but only for borderline cases.

[Charles Evans <charlesevans@chartertn.net>]

> I believe this should not be RC for Lenny.  The bug only triggers
> for people using multiple releases; so anyone hitting this bug
> should be able to get an updated version from unstable or
> squeeze-testing without needing it in Lenny.

I am totally stuck without a backport for apt 0.7.21.
Please mark this critical for lenny and etch.
I am running mostly etchnhalf, kernel is 2.6.24, but 
I need some bugfixes in testing and unstable.
Without apt 0.7.21, I can't do anything, even apt-get update.
(E: Wow, you exceeded the number of versions this APT is capable of)
With it, I can't do anything but update.
apt-get install -f 
says
195 upgraded, 125 newly installed, 179 to remove and 2525 not upgraded.