I have reverted to clean install removing Backports. I've also updated Aircrack to 1.2 rc2 and Kali 1.1.0.
[code]
root@kali:~# aircrack-ng
Aircrack-ng 1.2 rc2 - (C) 2006-2014 Thomas d'Otreppe
http://www.aircrack-ng.org
root@kali:~# lsb_release -a
...
[code]
root@kali:~# aircrack-ng
Aircrack-ng 1.2 rc2 - (C) 2006-2014 Thomas d'Otreppe
http://www.aircrack-ng.org
root@kali:~# lsb_release -a
...