I just went through a group of basketball championship pictures and need to upload them to a client's yearbook site. Upon export, the images had a huge amount of noise that wasn't visible at all in Lightroom. I tried various different export settings to no avail... even leaving the images full size still resulted in a huge amount of noise. I played around with some settings and determined that the Sharpening setting in Lightroom is causing this. I had set it to 100%, which shoes minimal sharpening improvement in LR, and no real effect on noise thats noticable. Upon export, its horrible. If I change sharpening to 0% the problem seems to entirely go away. Has anyone else run into this? By the way, I'm working with JPEGs here, not RAW.