IE8 displays legend in blue but all other browsers dispaly it correctly in white text. Why?

I have a Joomla 1.5 site with a client login on the page (rather than going right into the back-end) using the standard Joomla module, but when the login is accessed via IE* the tag displays in blue. It is set in the .css files as w开发者_高级运维hite. IE8 is ignoring this. Any ideas? This only shows when admin is logged in so hard to show the problem without setting a temporary password (thus giving the whole world access to the site-don't really want to do that!)