Whilst I have checked both the HTML and CSS for errors and have found none I have an issue with rendering using IE8 and IE7. IE9 is fine as are the other browsers. When I click on the navbar, the display loses all styling and displays for a second or less a default white background and text stretching across the full width of the display. Since my website background is a very dark shade of grey, almost black, the effect is most unpleaant. Has anyone any idea why this is happening?