Kartu, thanks for the wonderful additions, they made it possible to actually use SD card among the other great features!
If I may make a feature request: Bookmarking folders!
Problem: 505's inability to handle non-latin characters is making the default autor or title views simply useless - every book is put in the "Other" pile, searching for one is the simple "press 40 times next page"

Even worse, my try to put some non-latin directory structure on the SD card resulted in either nothing or very small bits of books to pop here and there.
Solution: I disabled SD card indexing, mounted the card and browsed it directly from your scripts. Even better, I organized the folders to allow "indexed" searching:
-[author first letter]
---[sequence]
------[book file]
Now I'm about to duplicate the books and create another folder sorted like:
-[book first letter]
---[book file]
And that should cover up most of the lost device functionality. However, it also results in quite a few clicks to get to anything, so to minimize these can I ask you for...
- Implement such indexing by author/title using filenames only? Nah, scratch that, too hard to do
- Ability to press the bookmark on some folders and these to show up (best) on main menu or (still great) direct inside the "Browse Folders"
Will love to hear what you think about the idea

Cheer!