I've had this problem since the beginning of the Android betas. Basically, it seems to happen somewhat randomly but under consistent circumstances: when I switch off the device with the reader running, when I switch back on the device there is a more than 50% chance that the file has reset it's position to the beginning of the file. This has happened on multiple devices and roms. I read lots of long books and this is a real headache. Anyone else having this issue?