When reviewing photos in the library mode, fullscreen, each photo that I navigate to uses more and more memory. After reviewing about 300-400 photos, it will exhaust all 12 gig of ram and I have to close Lightroom (5.7). It's easily repeatable on my system, and happens anytime I review photos. I can monitor memory with the task manager, and it increases with each photo viewed. I'm using Windows 10 x64. Thanks for your help!