Yeah, once I figure out which source file it is.
I must've mesed up back when I was moving all of the images to static.forums.soldat.pl
edit:fixed. When EH was making the theme and made the rules page, he forgot to declare a few globals so
$settings['images_url'] was an empty string (variable wasn't set at all, actually), thus resulting in it looking for the image at /menu.gif instead of
http://static.forums.soldat.pl/Themes/Soldat/images/menu.gif