Sure,
Tell us a little bit more about your setup though. I'm personally wondering:
1. Is this an LWAPP or autonomous environment (do you have a WLC)?
2. What model are the APs?
3. What verson of code are you running?
4. Are the other clients also Linux?
I think the first thing I would try is to reboot the AP that's giving you trouble and then I would run some debugs of the client on the AP, which we can give you when we know what type of network you have.