-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 OnError to be available in .NET 2.0, Silverlight and Compact Framework builds
-Added StreamingContext stand-in for frameworks where it isn't available
-Split test classes out of JsonSerializerTests
-Added JTokenEqualityComparer
-Added additional validation to new IDictionary/ICollection methods on JObject/JArray
-Changed JObject so that properties must have a unique name
-Changed remaining IConvertible calls to use ToXXX methods instead of casting
-Fixed many bugs in new IDictionary/ICollection methods on JObject/JArray
-Fixed AddFirst when no existing children
James Newton-King