HI all. I tried Backtrack 5 R1 64 and 32 bits, gnome as well as kde...but my RTL8191SEvB Wireless LAN Controller did not inject packets, so I had to buy a usb dongle to work with aircrack-ng. Yesterday, as I upgraded to Backtrack 5 R2, I wanted to test the RTL8191vB again. I was surprised to find that it could inject packets! Yes, it does. I tried it with two APs (wpa encrypted) and I could get the keys. I did not patch or download anything specific. I just update regularly. I googled and found no thread relating to this fact (that RTL8191SEvB works with aircrack-ng). I hope this can help someone.