Just came across something kind of weird with Aperture. Went to import a group of DNG files that I took a while back and when I pointed the program at the folder it seemed to me that quite a few images were missing. After checking the folder in finder... sure enough, Aperture wasn't seeing half the files. Tried copying all the files to another folder and pointing Aperture to that one... same thing. Opened LR and pointed it to the same folder and all the images are there. What's up with this. Frankly, if Aperture had seen all but a few of the images I wouldn't even have noticed that they weren't all being imported. This is worse than the program not seeing any of the files... at least then you know for sure your import won't work. Really strange...