I don't know how to document this but my 5.7 laptop about once a week has a hard crash when running ifconfig or dhclient on urtwn0. I have to hold down the power switch, turn it off, reboot.
My 5.0 machine with a different urtwn adapter is slightly worse, I stopped using it and use an old Atheros card. This would occasionally also crash if I unplugged the adapter and plugged it back in. Both give the "no buffer space available" message at times from the driver. Sometimes unplugging the adapter, putting it back and doing ifconfig and dhclient over again fixes it, sometimes it crashes it. Both machines are i386. On a quick look I don't see anything in /var/log/messages about it. -- Credit is the root of all evil. - AB1JX
