I was fiddling around and upgraded Blender to 2.71, and then, of course, I had to open up my old head-sculpture file to see if it worked. How about that... visible eyebrows. Perhaps some performance improvements have squeezed a few more polygons out of my hardware, or maybe I'm just forgetting how, exactly, it was broken. But anyway, looking back on it a year later it looks... kinda hideous.
Yeesh. I mean, it's OK, I guess, for an initial stab at something, by someone with almost no experience with these tools. But it's nowhere near what I wanted. One of these days I'll take another stab though, maybe at something similar, maybe at something else.