I just re-doctored my phone yesterday (back to 2.1.0), and I noticed that while in exhibition mode, the usually hidden folder button said "all images". And sure enough, when I flicked the screen I could see images from all of my multiple photo folders. This morning, It says "photo roll" and while I can select any one folder, it does not allow me to select multiple folders, nor is there an all images option.

What happened, and how do I get back to "all images"?