What is causing this bizarre behavior in Photoshop? It happens intermittently when I try to use one of the various "Transform" tools, such as the Warp tool. In this case, it has completely obscured the image of a waterfall that I was working on and is instead showing a collage of pages that I had open in Safari **but had closed before returning to Photoshop**. I can see fragments of a webpage that was five pages back in my Safari surfing history! I have this problem pretty frequently, but not always. It happens more often with really large, stitched files, but this one is a simple 22MP image with only a single layer in the file. And ideas? I'm using a 2011 Mac Mini Server with 16GB of RAM and Photoshop CS6.