Same problem...
Did the factory reset - loaded on a couple of ebooks - and now it is frozen....
I have found it freeze a couple of times when the battery runs low - but now frozen again with full battery?.. I guess I will recharge over night and see what happens...
Honestly my experience with pocket book and now kobo touch is lots of crashes...
With pocketbook i could disconnect the battery.. with kobo the only thing that seems to fix it is charge over night....
Yes I disconnect it properly.
Read somewhere else the corruption message could be coming from a corrupt non kobo epub..