So I'm not going to rage. I really want to. But I won't. I'm using Photoshop CS 5.5 (Windows). I was on the sixth version of a high fidelity Website mockup. The client asked that I provide them the design in PDF format. So from within the .PSD file, I select "Save As" and choose PDF as the format. I complete the PDF wizard and all seemed good.
No. Apparently, when you save as a PDF, it turns the PSD file you actively have open into a PDF? I noticed that the file type changed to PDF from PSD on the tab. "That's stupid," I thought. "I'll just change it back to a PSD, since I've made a few modifications since I saved it last."
You know, in Dreamweaver when you execute a "Save As", it opens the new file in its own tab. Just a thought.
Maybe my next choice was wrong, but it seemed instinctive to me. I decided to "Save As" again, but this time as a PSD file. I still had my layers in tact, so I didn't think there would be a problem.
I close out the file. When I open the PSD file back up just a few minutes ago, it's COMPLETELY FLATTENED. GONE. MY WORK IS GONE. Awesome. Thank you.