CritikalOwen xMinecraft Skins should be fully functional. Are you sure your server is set to online-mode=true ? Edit: Locked. It's just been brought to my attention that you've already posted a thread on this: http://forums.bukkit.org/threads/bukkit-help.286201/ and your server has authentication disabled. We do not support offline servers. FYI, that's also why your skins aren't working.