Well, from the email thread, it sounds like it sorta-kind-pretty-much works, and that they'd be perfectly happy for *you* to fix any such issues...just that they're tired of tracking down such things.
E.g., Key wrote:
> The most prominent /usr failure in udev land is unconfigured audio and
> 3G network cards. And the usual response is: "I don't need that.". :)