Hi, not the same problem as such however when I power mine on, I get the error that the application ContentService has stopped unexpectedly, & to force close. It doesn't affect the reading of books & I can access everything that I want to. I haven't done the firmware upgrade, I was going to as I thought that might fix it. Maybe I won't.
I haven't tried either soft or hard reset, won't do that until it becomes a problem but I'm not really powering it off/on for it to annoy me.
Have you tried reloading your books?