2009/3/9 Daniel Drake dsd@laptop.org:
I wouldn't be surprised if libertas multicast is broken in current upstream kernels. At least for the last 2 releases, OLPC have carried non-upstream patches to make this work. http://dev.laptop.org/ticket/7319
Oh, maybe not, that bug appears to have only affected the mesh. Still, testing multicast and broadcast would be a sensible first step diagnosis.