Andreas,
I have set my KPACS (V 0.9.4.1) up recently to receive images in JPEG Lossless format preferred. KPACS is accepting the images, but when I "Modigy" a DICOM tag such as the Description, once the images are modified and registered the study completly disappears from the imagebox. I have checked the KPACS directory under where the images are stored and there are gone from there as well. Needless to say, regenerating the database does not help either. When images are sent in as uncompressed, KPACS has no problem changing the tags. It seems to be just for the JPEG images. Thought I should let you know.
Ken