This is what iStock reviewers seem to think. I have attached two small images - they contain comparison of the final JPEG and unprocessed RAW files. Maybe someone could have a look and give me some tips - I am rather new at this. If larger images are needed - I can post them too. Thanks

Correction - I tried to attach a 60K JPEG - got an error message "Upload folder is full"...

The best is to upload a full sized watermarked version somehwere and then post a link to it. Have you tried posting this question in the istock critique forum? There you will get member feedback that is specific to istock.

We should remember that the reviewers make mistakes. On two occasions I was given the same reason for rejections, in both instances I shot in Jpeg and send the file as shot, with no post processing whatsoever. I just let it go.