Holy **** thats blinding, i can't read anything
What kind of screen are you complaining people using? Its color space is WAY off if you can't read that image. It's perfectly readable on my 2008 MacBookPro and isn't yellow. It's a medium shade of orange and the white text is quite readable.
My only complaint about iWork is Keynote for OSX lost so many standard features with the update. It is so dumbed down now I may have to revert to the old version.