no it has nothing to do with BT4 only with the update from Aircrack-ng from rc1 to rc2.
I noticed when using airodump-ng in bt4 that I didn't pick up as many networks as i did on bt3 final. It's like my cards signal isn't as strong on bt4 as it is on bt3. I did a test to see which backtrack picked up the most networks bt3, or bt4, and bt3 wins hands down. The down fall is that under bt3 my card doesn't support injection. I know I could patch the driver I just wanted to point that out to the team. Thank you!!
Wireless card: Linksy wusb54gc adapter.
Laptop: Macbook 2 GHz intel Core 2 Duo
1 GB 667 MHz DDR2 SDRAM.
P.s I was not attempting to crack any ones wep/wap it's just I noticed it when I scanned for my networks that the other networks that usually shows up under bt3 didn't show under bt4. That could hurt the performance depending on your location when running test.
no it has nothing to do with BT4 only with the update from Aircrack-ng from rc1 to rc2.