First, I know that I post on the wrong area, but I'm a "newbie", so....
I've found a bug to report :
On BT3 usb version, the suite aircrack-ng isn't up-to-date.
(In fact, you can't do the aircrack-ng attack on wpa using an airolib-ng forged databased ("-r" argument) on usb version, but only on cd version)
My two cents