ProtocolLib 2.5.0 Error Report

2013-07-24 18:41:32 [INFO] This server is running CraftBukkit version git-Bukkit-1.5.2-R1.0-27-gdc25312-b2815jnks (MC: 1.6.2) (Implementing API version 1.6.2-R0.1-SNAPSHOT)
2013-07-24 18:41:32 [SEVERE] Could not load 'plugins/ProtocolLib-2.5.0.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_6_R2.CraftServer.loadPlugins(CraftServer.java:239)
at org.bukkit.craftbukkit.v1_6_R2.CraftServer.<init>(CraftServer.java:217)
at net.minecraft.server.v1_6_R2.PlayerList.<init>(PlayerList.java:56)
at net.minecraft.server.v1_6_R2.DedicatedPlayerList.<init>(SourceFile:11)
at net.minecraft.server.v1_6_R2.DedicatedServer.init(DedicatedServer.java:106)
at net.minecraft.server.v1_6_R2.MinecraftServer.run(MinecraftServer.java:391)
at net.minecraft.server.v1_6_R2.ThreadServerApplication.run(SourceFile:582)
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>(Unknown Source)
at java.util.zip.ZipFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at java.util.jar.JarFile.<init>(Unknown Source)
at org.bukkit.plugin.java.JavaPluginLoader.getPluginDescription(JavaPluginLoader.java:243)
... 8 more
2013-07-24 18:41:33 [INFO] [PermissionsEx] sql backend registered!
2013-07-24 18:41:33 [INFO] [PermissionsEx] file backend registered!
2013-07-24 18:41:33 [INFO] [PermissionsEx] PermissionEx plugin initialized.
2013-07-24 18:41:33 [WARNING] ----- Bukkit Auto Updater -----
2013-07-24 18:41:33 [WARNING] Your version of CraftBukkit is out of date. Version 1.6.2-R0.1 (build #2818) was released on Wed Jul 24 05:01:21 CDT 2013.
2013-07-24 18:41:33 [WARNING] Details: /downloads/craftbukkit/view/02221_1.6.2-R0.1/
2013-07-24 18:41:33 [WARNING] Download: /downloads/craftbukkit/get/02221_1.6.2-R0.1/craftbukkit-dev.jar