I had a very specific problem with aireplay-ng. I will explain very quickly:

Old Scenario:

Old Laptop Intel cpu and chipset based
BT2 distro
PCMCIA Atheros 5001 card
everithing works fine......

I'm inyecting right now with a 4311 (mini pci-e)

I just only put it in monitor mode, start airodump, the aireplay -2 to capture data and aireplay -1 to force a deauth.

The only problem I know...

I had backtrack2 and boot with no problems. No with BT3 it hags after initializing serial ports. It only has a FIR port. I tried to disable it at bios, but the same happend.

I hope it could help...