2011-02-10 03:50:11 [WARNING] Failed to handle packet: java.util.UnknownFormatConversionException: Conversion = '%'
java.util.UnknownFormatConversionException: Conversion = '%'
        at java.util.Formatter.checkText(Formatter.java:2503)
        at java.util.Formatter.parse(Formatter.java:2485)
        at java.util.Formatter.format(Formatter.java:2414)
        at java.util.Formatter.format(Formatter.java:2367)
        at java.lang.String.format(String.java:2769)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:580)
        at net.minecraft.server.Packet3Chat.a(SourceFile:24)
        at net.minecraft.server.NetworkManager.a(SourceFile:232)
        at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:71)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:104)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:310)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:225)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:512)