We need 1.2.4. I went to Khorde's server, and this skeleton bastard was prancing around in the sunlight. I think I read on the wiki that stuff like grass and flowers were making a tiny bit of light or shadow or something which I assume was what was causing it to camp outside the emergency cave I made.
Seriously, I saw it at night, quickly dug a tiny hole in the side of a hill. I expanded it for breathing room, moved around. Day came, it was standing like 6-10 blocks away from the entrance, and whenever I opened it, it'd snipe me standing in the same spot in broad daylight. Note I just went to this server for the first time then, and had nothing to defend myself.