I also have problems here with encryption. currently i'm just restricting MAC adresses, but that's as insecure as WEP. on some clients, the encryption works, on others, it doesnt, and if you switch them, the one not working aint working then. dunno if those driver coding ppl intended that the end user uses encryption.
and often, WPA isnt supported. it's just a mess. funnily it runs fine on the university campus, dunno what they did
... well, maybe it's the nice cisco access points, and other expensive stuff