it seems that if you edit a post in Advanced Mode, when you hit the submit button, the post will be displayed without any of the line breaks.
i've noticed that when you go into advanced mode to edit, the default mode in Options is Pure HTML. i change the mode to plain text, but it doesn't take in the final posted edited reply.
i will make two posts after this, both exactly the same, both with line breaks. the first one will not be edited. the second one i will edit after posting it..