One of the more questionable changes that was introduced in 10.6 Snow Leopard was a soft, blue glow that appears around application windows when using Exposé. Previously, in 10.5 Leopard, the entire Window was highlighted blue; now, however, the Exposé window previews are able to update their contents on the fly and obfuscating them with a blue highlight negatively affects the user experience.
Unfortunately, the blue glow that Apple's designers have chosen to overcome this gap is somewhat garish and just plain lacking in style. In response, creativebits has posted a tip for changing that glow into something a little more eye-catching and a little less flashy.
The process is fairly simple and involves replacing two PNG image files within the Dock application. Creativebits has the full explanation as well as a sample set of replacement files that work pretty well and look very tasteful. Follow the break for a preview of the tip in action and decide for yourself whether the difference is worth the effort.