In a default mIRC installation (without any scripts) lines that continue onto the next line (wrap) are indented by 2 characters to make it easier to read. Without any scripts modifying the display, mIRC left-aligns all nicknames in the channel window, so a 2-character indent is sufficient. Obviously, scripts that move the nicknames around will also need to move the wrapped lines around as well.
-genius_at_work
