This problem is quite hard to explain, cause as far as I’m concerned it makes no sense. I think the best way to understand would be to take a look.
(The banner is on the home page at the top)

Basically, I have a banner which involves black text over a white background. It works fine on internet explorer, but just appears as a black rectangle on netscape and opera. Anyone got any ideas why? and more important how I can stop this happening.