First: I have Photoshop CS3 running on Mac OS 10.7.2. (This also occurred in 10.6.8.)
In Photoshop preferences, I have every preview-saving option enables in File Handling, yet Quick Looking a file it saves always gives me a "This layered Photoshop file was not saved with a composite image."
Why isn't this working, and what can I do to fix it?