my mini-pci cards regularly fail

Hi
I have two mini pci cards running in an Alix board, both will work
fine either together or singularly for a short while but then fail
with the following error

ieee80211_unref_node: NULL ieee80211_node *

I've tried a few different versions of madwifi including the svn
release of 0.9.4, the latest svn release and the one that comes with
from the debian package manager, all fail with either this or other
problems that just cause the machine to lock up (the error above is
from the debian package version).

I've tried to use the ath5k drivers but neither card is supported yet.

So, two questions, can anyone recommend a good (preferably cheap) mini
pci card that is supported by ath5k and is known to be stable when
used with kismet and has anyone else had problems getting the madwifi
drivers working on the Alix board?

Robin

------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
trial. Simplify your report design, integration and deployment - and focus on 
what you do best, core application coding. Discover what's new with
Crystal Reports now.  http://p.sf.net/sfu/bobj-july