On Sun, 5 Aug 2007, dieter roelants wrote:
> USB works initially but gives up after some use. An easy way to trigger
> this is scrolling with my mouse, but I've seen it with a umass device
> too. When this happens, auich is dead too (audioplay repeats the same
> sample over and over), again probably because they're on the same
> interrupt.

Can you try disabling fwohci and trying again?

Cheers,
Jared