I'm having a strange issue where iphoto and preview are stretching my photos out way too large when I click "actual size". I first started noticing pictures that were sent to me were very pixelated when viewed as the actual size, but when I zoomed out it became clear. I then started looking at some of my other photos, and realized they also were blurry when viewed at actual size. I have the new iMac and am a fairly new mac user, although my wife isn't new. The pictures I have were from my old linux box but were created by my digital camera. I can tell that it's stretching out the pictures too much because my display is 1680x1050. These photos are 2048x1536. When I view them full size and stretch the window as large as the screen, I can only see about 60% of the width of the picture, but if I'm actually seeing about 1680 of the 2048 pixels in the width, I should be able to see about 80% of the picture. There is no photo that I have so far viewed actual that hasn't been pixely. Also, this happens with photos from two different cameras. So far, I noticed a screenshot png I took does not have this problem, but almost everything else does. Also, many of the pictures I've imported into iphoto are not viewable full-size. The thumbnail shows up, but when you double click on it to expand, you just get a circle with a ! in the middle. One album that we imported was fixed when we re-imported the pictures. Maybe I'll have to do this with the rest of my pictures.