I use iPhoto 09 and Snow Leopard and I see the de-noise feature in the adjust button. I use this, and it shows the change, but when I click done and export, the change is not saved. I've looked around at other forums and Apple Support and no fix has been found. It seems that other people do not have this problem. So I thought it might be an iPhoto library issue or Snow Leopard or whatever. So I formatted and completely reinstalled LEOPARD and iPhoto and just imported one photo, tried it again, and STILL the same problem. I click 'edit' and then 'adjust', all the other changes will save EXCEPT for the NOISE changes. Anyone able to fix this or offer any advice? Thanks!