Synaptic gives me this
APT system reports:
E: Unknown signature /var/cache/apt/archives/fedora-package-config_4-2%5f3.rhfc4.at_noarch.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/fedora-release_4-2%5f3.rhfc4.at_noarch.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/libsndfile1_1.0.11-6.rhfc4.at_i386.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/libsndfile_1.0.11-6.rhfc4.at_i386.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/libasound2_1.0.9rf-21.rhfc4.at_i386.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/libglib-2.0%5f0_2.6.4-1%5f11.rhfc4.at_i386.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#66534c2b)
E: Unknown signature /var/cache/apt/archives/libgmodule-2.0%5f0_2.6.4-1%5f11.rhfc4.at_i386.rpm: (SHA1) DSA sha1

I have no idea how to fix it
Does anyone know?

Probably the new apt. It wants a gpg check but the servers haven't included that yet.

Alright, Thanks

I get the same on mine...I just turn off signature verification and all proceeds smoothly.