We now know that Milo can pull himself up to a standing position in his crib. Which solves the mystery of how he got the baby monitor camera off the wall: a few days ago Jason saw Milo gazing into the camera as he held and pawed it like a toy, a disconcerting vista, to be sure. Then yesterday, I spied him through the bars of the crib (camera now moved to bookshelf) as he pulled up and reached for the pictures hanging over his bed, and jumped up and down like a baby gorilla at the zoo.
Time to lower the crib, I think.