I get this? What do?

MC 1.1-R4

02.03 01:32:33 [Server] INFO at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
02.03 01:32:33 [Server] INFO at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:408)
02.03 01:32:33 [Server] INFO at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:148)
02.03 01:32:33 [Server] INFO at net.minecraft.server.ServerConfigurationManager.(ServerConfigurationManager.java:52)
02.03 01:32:33 [Server] INFO at org.bukkit.craftbukkit.CraftServer.(CraftServer.java:141)
02.03 01:32:33 [Server] INFO at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:182)
02.03 01:32:33 [Server] INFO at org.bukkit.craftbukkit.CraftServer.loadPlugin(CraftServer.java:199)
02.03 01:32:33 [Server] INFO at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:380)
02.03 01:32:33 [Server] INFO at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:1057)
02.03 01:32:33 [Server] INFO at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:230)
02.03 01:32:33 [Server] INFO at net.milkbowl.vault.Vault.onEnable(Vault.java:137)
02.03 01:32:33 [Server] INFO java.lang.NoSuchMethodError: org.bukkit.plugin.PluginDescriptionFile.getAuthors()Ljava/util/List;
02.03 01:32:33 [Server] SEVERE Error occurred while enabling Vault v1.2.12-b136 (Is it up to date?): org.bukkit.plugin.PluginDescriptionFile.getAuthors()Ljava/util/List;

Would appreciate your help thanks :)

you update to the latest version.

Vault or Bukkit?
I got the issue because of the Vault upgrade.

The error only happens if you haven't updated Vault to 1.2.12

I'm getting this same error as well, and I've downloaded the latest Vault, 1.2.12.

Having checked the plugin.yml, it's saying the one I downloaded is in fact Vault 1.2.12-b136, not 1.2.12.

Maybe the wrong file has been uploaded?

same thing. this happens when you're not running R6. If you don't intend to update to the latest CB don't update Vault.

Ah, thank you. Not updating to R6 due to this: http://forums.bukkit.org/threads/warning-all-plugins-with-empty-sections-in-plugin-yml-will-crash-the-server-in-r6.62791/#post-996375

So guess I'll just stick with 1.2.11 for now.

I know I've had some people do this over other plugins before, it's always a good idea to check the CB compatibility version next to the file you're downloading just in case you're having issues or aren't sure when upgrading :)