1.3.1 Developer Errors

Found an error for 1.3 dev build:

2012-08-03 09:30:46 [WARNING] Server permissions file permissions.yml is not valid YAML.
java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Map
at org.bukkit.craftbukkit.CraftServer.loadCustomPermissions(CraftServer.java:585)
at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:251)
at org.bukkit.craftbukkit.CraftServer.reload(CraftServer.java:564)
at org.bukkit.Bukkit.reload(Bukkit.java:182)
at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:22)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:168)
at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:490)
at net.minecraft.server.NetServerHandler.handleCommand(NetServerHandler.java:862)
at net.minecraft.server.NetServerHandler.chat(NetServerHandler.java:822)
at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:804)
at net.minecraft.server.Packet3Chat.handle(Packet3Chat.java:44)
at net.minecraft.server.NetworkManager.b(NetworkManager.java:281)
at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:105)
at net.minecraft.server.ServerConnection.b(SourceFile:35)
at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:559)
at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212)
at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)

If this is for one of my plugins please tell me, but it looks like its a normal bug.