[debian] apt segfaults after corrupted package download on d-u

[Marcel]

Moin!

I just d-u'ed and got a corrupted linux-libc-dev_2.6.26-4_armel.deb so that 
dpkg failed to install it. then I deleted the corrupted package 
from /var/cache/apt/archives to make apt redownload it, but now it ends up 
with a segfault when attempting to read the dependency tree [1].
What may I do about that?

-Marcel

[1]: http://rafb.net/p/wNWqKp94.html