I have many issues with this forum engine, I really don't like it much. But I have no problem reading white on black though, try zooming in maybe? ( CTRL+ mouse wheel )
Haha thanks for the tip but that's not the issue, it's the contrast. I feel like I'm on mushrooms or something trying to read this 
I would happily write the script to edit the CSS on a button press if I had permission. I mean in theory it's a couple of functions that would just need rolling out into the PHP which generates the forum pages.