Bukkit

CraftBukkit version git-Bukkit-1.1-R6-31-g0545c46-b2032jnks (MC: 1.2.3) (Implementing API version 1.2.3-R0.1-SNAPSHOT

09:27:27 [SEVERE] Error occurred while enabling xWarp v3.1.6 (Is it up to date?)
java.lang.NoClassDefFoundError: de/xzise/XLogger
    at de.xzise.xwarp.XWarp.onEnable(XWarp.java:56)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:215)
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:336)
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:363)
    at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:250)
    at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:232)
    at net.minecraft.server.MinecraftServer.t(MinecraftServer.java:374)
    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:361)
    at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:187)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:425)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
Caused by: java.lang.ClassNotFoundException: de.xzise.XLogger
    at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:41)
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:29)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    ... 11 more

Try this one: https://github.com/downloads/xZise/Bukkit-Plugin-Utilties/bukkitutil-1.3.0-B7.jar

I had that error earlier, downloaded the 1.2.3 one. When I downloaded this one, it works :)