Once I change something in my AP (3com OfficeConnect? router but only used as an WLAN <--> LAN bridge) that requires the AP to reboot or atleast cut all connections, the client will get a kernel panic.
The last row on tty0 is this:
80 00 00 00 ff ff Kernel panic - not syncing: ifmedia_set
More info can be found here: http://dev.azoff.se/madwifi-ng/
I am currently using snapshot as of 10th May (r1545) on a Gentoo 2005.0 installation with 2.6.16-suspend2-r4 kernel with preempt.
I'll be happy to test patches aslong as the don't break my hardware =)
You can reach me on this mail (madwifi-ng@azoff.se) or on IRC (Azoff @ freenode for ex.).