Sorry for the lack of news today; the bug reported by pwalker8 is turning out to be a lot more difficult to fix than I had hoped.
Since it's a bug likely to affect anyone with an older device and 2,000 or more books, I have to fix it. Now if only it would stop fighting back
Anyway, I'll post again once I've resolved it. I'm aware a few new testers have signed up and haven't received their download link yet. I'll do that once I've fixed this bug; there's no need for other people to experience the same issue. Hopefully this will be sorted early next week. Thanks!