Bukkit

What steps will reproduce the problem?
1. Clean install v2.3
2. Run Server

What is the expected output? What do you see instead?
An error occurs on Server startup and using any Pb commands results in unknown command.

What version of the product are you using?
2.3

Do you have an error log of what happened?
2013-01-21 00:08:29 [SEVERE] Could not load 'plugins/Pushball2.3.jar' in folder 'plugins'
org.bukkit.plugin.InvalidDescriptionException: Invalid plugin.yml
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:255)
at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:132)
at org.bukkit.craftbukkit.v1_4_6.CraftServer.loadPlugins(CraftServer.java:239)
at org.bukkit.craftbukkit.v1_4_6.CraftServer.<init>(CraftServer.java:217)
at net.minecraft.server.v1_4_6.PlayerList.<init>(PlayerList.java:52)
at net.minecraft.server.v1_4_6.DedicatedPlayerList.<init>(SourceFile:11)
at net.minecraft.server.v1_4_6.DedicatedServer.init(DedicatedServer.java:104)
at net.minecraft.server.v1_4_6.MinecraftServer.run(MinecraftServer.java:399)
at net.minecraft.server.v1_4_6.ThreadServerApplication.run(SourceFile:849)
Caused by: java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.<init>(ZipFile.java:214)
at java.util.zip.ZipFile.<init>(ZipFile.java:144)
at java.util.jar.JarFile.<init>(JarFile.java:152)
at java.util.jar.JarFile.<init>(JarFile.java:116)
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:243)
... 8 more

Forget about this ticket, it's the same mistake on my part as http://dev.bukkit.org/server-mods/recipelookup/tickets/1-version-1-1-2-invalid-plugin-yml-prevents-loading-of/