Text not being displayed on Register page

[Andyx]

I have select Dark as my color scheme as the rest of my site is black. This gives me a problem as the text on my Register page is black too and therefore doesn't show up. I have not edited my style sheets. Is this something I need to do or is there another problem.

Example - Visit http://galleries.photographers.co.uk/index.php and click Register on the top menu bar.