Hello. I noticed problem on my server: Some places, where I trying to place any blocks, thay are just disappear and don't want to being placed. It's able to place blocks on that places, but it's hard. So, there in no any protection place or somethin, just bug. Also, if I even successfully place block on that cursed place, it can disappear sometime later. I think it is bukkit problem, because I tried to place blocks at single creative and survive modes - everything is seems to work; I also tried at bukkit server without any plugins - but there is still that problem. Thanks for any feedback.