I've noticed that the forum software parses out repeated space characters and would like to suggest the same for newline characters in excess of two consecutively.

There seems to be an issue where a large number of newline characters near the beginning of the first post in a thread bugs out the mouseover preview (causing it to flicker), and given that there's no practical need for the type of vertical spacing that repeated blank lines allows it seems to me to be an easy fix for a fairly common annoyance.