Arg, the U key was intermittent.  I fiddled with it for a bit, and now it functions but the tactile and audible feedback is just slightly different than every other key, but enough that I notice.  I really don't want to send this in.  Can someone tell me how to safely take apart one of these Fukkas?  I'm out at a cafe at the moment, so I won't be doing it right now, but I'd rather not have to send in an otherwise great keyboard.
BTW, I think I like the Apple keys better, giving more of a thunk than the thinner Filcos.