Comment 21 for bug 502433

found this thread
http://thread.gmane.org/gmane.linux.network/151941/focus=151968

"From a distro point of view, you would not want to set FORCE_PIO as the performance penalty would be very large."

"We certainly hope to fix the issue. We do know that the failure occurs when b43
is loaded after a cold boot, but if one warm boots after using wl, then it works
OK. There is some kind of initialization problem that only shows on Atom and
some Intel Core Duo CPUs."

also the issue still occurs in mainline ppa 2.6.33 kernel.