Well, the problem got worse and worse! Suddenly nothing would open from my library onto the eink side! Then it was showing my sd card as being empty!!! I reset the thing, rebooted. That didn't help. So I tried flipping out, cursing god and the universe, then crying in a corner wearing nothing but soiled boxers and sucking my thumb while rebooting another couple times... and it worked! Anybody who has this issue please follow my procedure exactly! Results do not lie.