2010-12-22 22:23:10 [SEVERE] Exception while calling plugin function in 'class VehicleListener' while calling hook: 'VEHICLE_POSITIONCHANGE'.
java.lang.NullPointerException
at Item.(Item.java:247)
at Chest.getContents(Chest.java:59)
at NearbyChestBlockBag.addSingleSourcePosition(NearbyChestBlockBag.java:199)
at VehicleListener.onVehiclePositionChange(VehicleListener.java:529)
at PluginLoader.callHook(PluginLoader.java:619)
at jo.g(jo.java:425)
at jo.b_(jo.java:308)
at eq.a(SourceFile:1068)
at ex.a(SourceFile:37)
at eq.f(SourceFile:1044)
at eq.c(SourceFile:1023)
at net.minecraft.server.MinecraftServer.h(SourceFile:268)
at net.minecraft.server.MinecraftServer.run(SourceFile:210)
at bx.run(SourceFile:484)

CraftBook version dev-aa69442

Bug with hMod. Should be fixed now.