Bug fixed: Custom white balance set on the RAW preview should now be taken into account properly.Bug fixed: Low values for the white or black clip settings should now be saved correctly in XMP files and as sticky settings.Bug fixed: “As Shot” white balance should now be closer to the expected behavior.Bug fixed: When source images are grayscale, generate HDR and the functions under the combine menu should not crash anymore.Changed the calculation for the option “attempt to reverse-engineer tone curve applied” of generate HDR and made it available with images in 16 bits/channel mode as well.Option in batch processing to leave the aligned results uncropped.Ability to set in preferences the default white balance used for RAW conversion.Sticky settings for batch processing (applicable to the general settings for running the batch and not to the HDR or tone mapping settings used with batch processing).Updated RAW conversion to include recent camera models such as the Pentax 10D.This option enables users to create an HDR image from large files without exceeding available RAM. Strip-processing option to generate an HDR image with batch processing.

Ability to adjust the white balance and output color space when creating an HDR image from differently exposed RAWs from HDR->Generate.Options for naming of output files of batch processing.Undo and redo of the last settings done on tone-mapping window.Slider to adjust Gamma setting when tone mapping with details enhancer.There is a separate option depending on whether the ghosts are caused by moving objects/people or periodic movements such as rippling water. Option for reducing ghosting artifacts in generated HDR image.Full List of upgrades, from the HDRSoft website:

Photomatix pro 4 update