Lately I have been having a problem with my iPhoto. Each time I try to open some pictures an alert message pops up: "The photo xxx could not be opened because the original item could not be found." I have been downloading photos--either direct from my camera or from the mail--the same way I used to for more than a year now. I didn't have any problem then until today. Maybe someone has been tinkering with my PB and accidentally changed some of my settings. What to do? Help! Thanks.