While this fix appears to have resolved the navigation transparency issue, it has removed the background from behind the logo and causes an odd stacking of the nav in portrait mode on the iPad: http://camp-aviation.com/wordpress/
I think there’s just not enough room for the logo and 5 menu items when your iPad is in portrait mode, which causes the menu items to wrap. I’d suggest to use a media query there to make the text in the menu items some 12 pixels.
Right – I thought that might be the issue. Just not sure how to go about implementing a media query there. Is it basically picking up the same code that renders the menu in dropdown form on a smartphone?