Cleven has been working good for me, but I've had a few issues. Lately, I have problems with WEP. When I start packet playback, I get unauthorized. When I stop playback, it can authorize again. Makes cracking time consuming and/or requires me to keep opening and closing the packet window. Also, sometimes in a list of available access points, if I select one to attack, it actually selects another. The common theme, I'm guessing, is Cleven is sometimes mixing up MAC addresses. Is this a known issue?