This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Replace the image being used for the close button with one of a different colour. If you want different colours in jQuery UI it's easier just to modify the theme than it is to go hacking in the CSS files.