im running iphoto 09 version8.1.2 and when I click on a photo to enlarge it i get a giant picture of an exclamation point (!). my hardrive only has 5 gigs left from 250. also I think a few photos are missing. how can this be explained ? I have previously done a back up on this computer ---------- on further inspection the photos that turn into giant ! are all photos that have been sent to me via text messages and imported into iphoto. I am unable to enlarge them or take them out of iphoto. I have seen these photos before and perviously "a few months ago" have been able to enlarge them no problem. what could have caused this?