If you're lucky enough to already be an owner of a new MacBook Pro with Retina display, you may have found yourself with a dysfunctional trackpad. Fortunately, Apple was aware of the issue and Trackpad Update 1.0 is now available for download. The update contains no other significant changes other than a solution to "an issue where the trackpad may not respond consistently to user input," but Apple recommends that even unaffected owners apply the patch.
Apple rolls out update to fix non-responsive MacBook Pro with Retina display trackpads
Apple's Trackpad Update 1.0 is available now for non-responsive MacBook Pro with Retina display trackpads.