(2008-04-03 21:45:40.8826) [Fatal] A fatal, unhandled exception was encountered! System.InvalidOperationException: Collection was modified; enumeration operation may not execute.
   at System.ThrowHelper.ThrowInvalidOperationException(ExceptionResource resource)
   at System.Collections.Generic.Dictionary`2.ValueCollection.Enumerator.MoveNext()
   at WCell.RealmServer.World.ZoneSpacePartitionNode.GetEntitiesInRadius(BoundingSphere& sphere, LinkedList`1 entities, ObjectTypes filter)
   at WCell.RealmServer.World.ZoneSpacePartitionNode.GetEntitiesInRadius(BoundingSphere& sphere, LinkedList`1 entities, ObjectTypes filter)
   at WCell.RealmServer.World.Region.GetObjectsInRadius(Vector3& origin, Single radius, ObjectTypes filter, Int32 limit)
   at WCell.RealmServer.Entities.WorldObject.GetNearbyCharacters(Single radius, Boolean includeSelf)
   at WCell.RealmServer.Entities.WorldObject.DefaultValueUpdate()
   at WCell.RealmServer.Entities.WorldObject.BroadcastValueUpdate()
   at WCell.RealmServer.World.Region.RegionUpdateCallback(Object state, Boolean timedOut)
   at System.Threading._ThreadPoolWaitOrTimerCallback.WaitOrTimerCallback_Context(Object state, Boolean timedOut)
   at System.Threading._ThreadPoolWaitOrTimerCallback.WaitOrTimerCallback_Context_t(Object state)
   at System.Threading.ExecutionContext.runTryCode(Object userData)
   at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading._ThreadPoolWaitOrTimerCallback.PerformWaitOrTimerCallback(Object state, Boolean timedOut)