I have had the same issue with my Asus Transformer Infinite. I typed a long note while in an (important) meeting assuming evernote would save as I typed. When I hit save a message "Err EnoEnt" or similar popped up and my note was blank. My data simply vanished with no way to recover it. Needless to say I cannot use evernote anymore if it fails at it's most basic functionality. How can I use it for anything slightly important if I can't trust it?