Add one. This seems to happen to me most often when I am switch apps. It seems that evernote is not compatible with the multi tasking implementation on iOS 4. Often when I come back to the note it is blank and asking me to save changes. Sometimes if I save I lose the whole note - sometimes it's just the recent edits. Frequent saving is the answer but as this closes the note the workflow is painful. Love to know what is happening on this.