I'm using the MVC samples provided in the Ajax Uploader download along with Visual Studio 2010 RC, .NET Framework 4.0 RC and Silverlight 3.  I will occasionally get the following error when uploading multiple files:

 

http error 1 : 12030:Unknown

 

Is there a way to prevent this error or trace down the randomness of this error?  Right now this error is too random and too frequent to allow us to use Ajax Uploader in an application.

 

Thanks,
Matt