I have to admit, I am not a heavy user of my BP. But, I have a 4GB card and had not noticed any real problem. Until recently... I just subscribed to Book Share recently. So, I have been putting maybe six books at a time on the BP. I basically have nothing else on it, so there is hardly anything when considering it is on a 4GB card. At first I thought this problem was because I had the books in the root directory, but then I created a Books folder and the problem persists. I stop reading for a time, maybe hours or maybe just minutes, and when I press read again, nothing happens. If I press and hold a key, I can get about a half a beep. I have tried pressing the four corners, not minding if it reformats at this point, and nothing happens. I have taken out the battery and put it back and no fix. I try more keystrokes and then pop the battery again and when I replace it I get the message the BP was restored to defaults, etc. However, the time is correct and I am left at the spot where I last was reading. It only seems to cause a brief moment of panic and then frustration, and finally wonder that everything is back to normal. Maybe I should try reformatting the card in the computer? Any ideas will be appreciated.