I'm running CB b1559 and iChat 2.4.5 and getting this error on plugin load. Plugins that use Vault don't have working economy though they do hook the plugin.

01:58:31 [SEVERE] Error occurred while enabling Vault v1.1.7-b101 (Is it up to date?): net.milkbowl.vault.Vault cannot be cast to net.TheDgtl.iChat.iChat
java.lang.ClassCastException: net.milkbowl.vault.Vault cannot be cast to net.TheDgtl.iChat.iChat
at net.milkbowl.vault.chat.plugins.Chat_iChat.(Chat_iChat.java:42)
at net.milkbowl.vault.Vault.loadChat(Vault.java:138)
at net.milkbowl.vault.Vault.onEnable(Vault.java:89)
at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:188)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:957)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:280)
at net.madjawa.pluginreloader.PluginReloader.loadPlugin(PluginReloader.java:231)
at net.madjawa.pluginreloader.PluginReloader.onCommand(PluginReloader.java:84)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:165)
at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:372)
at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:368)
at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:553)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:530)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

Also, when other plugins are loaded it shows this error:
02:08:09 [SEVERE] Could not pass event PLUGIN_ENABLE to Vault
java.lang.ClassCastException: net.TheDgtl.iChat.iChat cannot be cast to net.TheDgtl.iChat.iChat
at net.milkbowl.vault.chat.plugins.Chat_iChat$PermissionServerListener.onPluginEnable(Chat_iChat.java:59)
at org.bukkit.plugin.java.JavaPluginLoader$47.execute(JavaPluginLoader.java:585)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:964)
at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:280)
at net.madjawa.pluginreloader.PluginReloader.loadPlugin(PluginReloader.java:231)
at net.madjawa.pluginreloader.PluginReloader.onCommand(PluginReloader.java:79)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:40)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:165)
at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:372)
at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:368)
at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:553)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:530)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)

1.1.8 is already out with the fix.. Please update.