Hi everyone, I recently bought and started using Aperture 2 when I upgraded to a newer iMac and figured iPhoto wasn't handling 30,000 images too well anymore. So anyway, after finally getting all my photos from my iPhoto library into Aperture, I realize that I have TONS of duplicates, even though in the "import iPhoto library" window I clicked "do not import duplicates." These duplicates appear to be just rotated versions of the original files, like portrait style photos turned right-side-up. They're grouped into what I have learned (through the online tutorials) are called 'stacks.' Is there a way for me to isolate these duplicates and delete them? I have a feeling they're adding a lot to the total space my Aperture library is taking up... Thanks in advance!