Was reading a book and it just froze up. No page turn, nothing. Couldn't even turn it off. I had installed new batteries 2 days ago (not rechargeables). It will turn on and go to the first page, (jetBook-Lite), but goes no further. I guess I will try contacting Ectaco. I bought it from Newegg, so hope Ectaco will honor my warranty.
Should have said that I got it in Jan and was still running firmware 14 (something). I didn't upgrade because I was afraid this would happen.