I have a Pentax ISD and I'm using a Sandisk II card with it. After a number of pictures, I would take a picture and then the screen would say "Image is not stored" and it wasn't saved in the card. But then I would take another picture and the picture would be saved. I'm not sure if it did that because I was out of memory (but the small screen on top that shows the battery and such had a number of about 350, but I'm not exactly sure what that numbers is referring to, either) or something like that. So I was just wondering if anyone could explain to me why it would randomly say "image is not stored" and what the number on the top screen near the on/off switch means. Thanks.