I agree with all the above posters -- this is a major problem with EverNote. I love everything else about EverNote, but I use line spacing to help me visually separate ToDo items or other blocks of text, so having wonky mixed single/double line spacing is a disaster. If I paste plain text into a note, it has normal single spacing. But if I hit enter at the end of a line of text, it seems to change to double-spaced mode. (As other people have suggested, I wonder if EverNote inserts \n\r and then reads this as two newline characters...) Would be great if this could be fixed!