Couchbase 2.0 Bet corrupts "long" c# fields

Server: Windows 2008 R2 64 bit

Client: C#

Confirmed Json string being written with .Save and the long value is correct during the save function.

In read function and also the Admin UI the value of the long field is incorrect. Here is an example:

Document: fbUser_634851623223408516

{
"CreatedTime": "/Date(1349565522340-0700)/",
"TableExpires": "/Date(-62135568000000-0800)/",
"UserId": 634851623223408500,
"UserName": "634851623223408516",
"UserPin": "888",
"recType": "fbUser"
}

UserId should be same as UserName as was confirmed during the .Save function.

Any ideas why the long

[DataMember]
[JsonProperty(PropertyName = "UserId")]
public long UserId { get; set; }

gets corrupted?