I have an Acer Aspire 5610Z. On it there is a sticker saying that "Contains Atheros Module AR5BXB63". Despite this, both in BT4 and in Ubuntu 9.10 the chosen driver is iwl3945, and not to complain or anything, but because of some unknown reason my Intel 3945 works out of the box with BT4 (except for the fact that wicd wasn't enabled by default, which I eventually found in the forum). Injection works, I've tested it with various aireplay attacks and everything is tip-top. Any comments or ideas why might this happen?