-Changed serializing ISerializable types under partial trust to error to fix security issue -Fixed LinqBridge collision error in .NET 2.0 by moving types to a different namespace -Fixed JObject.Keys error when object has no items
-Changed CustomCreationConverter to throw NotImplementedException when serializing
-Fixed serialization of Uri members on Silverlight/Compact Framework -Fixed serialization of JToken members -Fixed (hopefully) cache threading issues
James Newton-King