The number one reason why images don't import correctly is because they were not imported directly from the camera's memory card. No other software or application (Lightroom, Photoshop, Aperture, etc) can be used in between the camera's memory card and Tagger. Always use Tagger to import the images directly from the memory card.
While HDReal® is designed to work with either RAW or Jpeg source images, there is no added benefit to shooting in RAW with the HDReal® System. Shooting in RAW will increase the upload times for images but will not result in a higher quality final HDReal® Jpeg image.