Ok, so this is one of the oldest problems of Mac & PCs: the difference of gamma settings, which makes "normal" pictures from a mac appear darker when seen on a PC. Application of today: part of my friends call me to ask why I didn't correct/lighten my photos before sending them on my site. Are there any solutions for that ? In iWeb, or in general web design ? I heard some rumours that .png was supposed to help, but no clue about how. I don't think my iMac is so badly calibrated either. Suggestions welcome... Thanks, Arnaud. (Edit: removed broken link).