> If I insert somethink like > Package: binutils > Pin: version 2.12.90.0.15-1 > Pin-Priority: -1 > [...] > to /etc/apt/preferences, it will be ignored. So there is no > way to knock out a buggy newer version. Only the following works: > Package: binutils > Pin: version 2.12.90.0.14-1
(I am assuming that the buggy version is 2.12.90.0.15-1 and the non-buggy version is 2.12.90.0.14-1.) Does it make sense to pin a package to a buggy version to which you give a low priority? Don't you want to pin the package to a working version to which you give a high priority?

