Bkgd color not showing in safari

Greetings~

I have a quick question that's stumping me. The site is:

http://www.dulutharmory.org/

In Firefox, the menu looks great, and when you're on a page (say, "Home") It's highlighted in white with brown writing.

However, in Safari (current version), the white doesn't show up, and instead the background image with brown writing appears.

Any help to debug this would be greatly appreciated and repaid in donation.

Best,
Matt.