I use Lightroom exclusively for photo processing. At one point, I had an issue where iphoto was copying every picture so I had twice the number than I thought. I fixed that and the iphoto library now shows nothing.
Out of curiousity I looked at my 'About this Mac'. It said I had 233GB worth of pictures. Yet my pictures folder only has 121GB. How can I find find the other 100GB worth, and what else could it be that's causing this?