I have tried both 0.5 and 0.5+CVS on my laptop with Centrino, installed with Fedora core 1 (2.4.25 and 2.6.4). Without WEP it works fine. With WEP, it does not work. It seems it is sending out data but not receiving. I guess it is the problem with the key since its behavior is just like setting a wrong key intentionally. Is it a known problem? Please tell if you need any more info.