You will need to install a user script manager extension to install this script.
Old notes in yahoo notepad are not rendering correctly in the current incarnation of yahoo! notepad.
Newline and other white space characters get eaten and the whole note looks like a smushed up mess.
Maybe it'll get fixed at one point, maybe not.
Until then, this tiny script restores some basic formatting to your notes. yay.
(But really, are you sure you should be using Yahoo! Notepad?)