Using froyo 5-1-fixed:
after booting with wifi enabled an error message appears that system stopped working..
Giving two options wait or force close.

When pressing wait and then the powerbutton, after a few seconds I get 2 messages on the command line..
..- wl1251 could not get firmware: -2
..- wl1251 unloaded

and after pressing the powerbutton again, wifi is indeed disabled on the power menu.

I can re-enable wifi after that, but it won't work.

This behavior is reproduceable with every boot.

Hope this helps in troubleshooting.

Keep up the great work!