after copying my photos (about 3000+) from my Windows PC to my Mac, i imported them into iPhoto 6. i imported them folder-by-folder, so as to preserve the old folder names and make them as film roll labels. after importing them, i trashed the duplicates (a lot of them) and edited some photos. i also trashed the source folders (outside the iPhoto library folder), since they have supposedly been copied into the iPhoto library. please note that my iPhoto 6 was configured to copy the photos as they were added to the library. then, i emptied the trash folder in iPhoto 6 (not the "global" trash folder in finder). to my surprise, iPhoto now showed blank boxes of my photos. i clicked "Show File" but no window appeared. i tried manually finding them (using finder) in my iPhoto library, but to no avail. what could have happened? i tried rebuilding the iPhoto library (http://docs.info.apple.com/article.html?artnum=107947), but it did not work. good thing i did not empty the "global" trash folder in finder. i manually imported the trashed"source folders again to iPhoto. this time, the blank boxes re-appeared, and another set of the same photos (with the same folder and file names) was made. so, i trashed the duplicates again. now, i'm not sure if the problem will re-occur if the emply the iPhoto trash folder. what could have been the problem? any advise to prevent this from happening again? if this will be the case, i would be hesistant to configure iPhoto to copy the photos as i add them to my library. what do you think? thanks in advance.