I also got an error while trying to use tts.
Text-to-Speech encountered an error. Please restart your Kindle from Menu in Settings. If the problem persists, contact Kindle Customer Service at http://www.kindle.com/support
I plugged my Kindle into the computer to check out the files, and the tts folder is there, but there are no files inside of it. Is there a way to get a permanent link posted on this forum with the tts files? Especially since this seems to be a relatively common issue. If not, I would greatly appreciate someone sending me the files. Lots of presents to wrap before Christmas and would like to listen to my books while I'm busy. TIA