This causes NFS mounts to become inaccessible, and when NFS mounts are inaccessible in BSD you are then dropped to single user mode.
The only solution we have found thusfar is to add a delay to:
echo "sleep 10" >> /mnt/root/etc/rc.d/netif
In order to give the card some time to initialize before the OS boots and attempts to mount the remote filesystems.
This issue does not seem to be entirely localized to BSD as some Windows workstations have experienced similar issues. The main thing is though, this causes complete functional failure for BSD when you are dropped into single user mode after a reboot.