:: detour here for closer look at past month's logs ::
Don, I think you must just have prettier pictures than me ;) No activity in any roboted-out directory-- and there are a lot more of them than there were the last time I looked closely at this robot. In particular, I've Disallowed about half the e-books-- and it didn't visit any that it wasn't supposed to.
Odd corollary discovery: Within the /paintings/ directory, all msnbot-media activity involved blowups linked in the form <a href = "filename.jpg" target = "_blank">. (Logs don't say so, of course, but I can tell from the page names. This kind of linking doesn't occur in any other directory.) Overall, about half the full-size jpgs are linked like that while the other half are embedded in individual pages. And then for every big picture there's a thumbnail, 1/4 linear size; the robot wasn't interested in any of those.
That made me curious enough to pull up another months' raw logs, looking only at /paintings/. Same pattern. Hm. Wonder what they're up to?