The following code creates a hold on the temporary file on disk, even though I close the stream. The only way to continue to use the component is to shut down the aspnet_wp.exe to free the hold on the temporary file.
protected void Uploader1_FileUploaded(object sender, CuteWebUI.UploaderEventArgs args)
{
byte[] imageBits = new byte[args.FileSize];
Stream ms = args.OpenStream();
// removing this statement makes the problem go away
ms.Write(imageBits, 0, imageBits.Length);
ms.Close();