I don't know if any one else is having the same problem but as of 11.04 I can not even compile the aircrack source anymore. functionality is down to about 50% on both my cards (alfa 36h and 36nh). also trying to compile from compat source is equally useless. seriously considering going back to 10.04 or even back to debian pure. if any1 has a breakthrough would be good to hear it