Mac OS X Lion introduced iOS-style scrolling elasticity. Do you think it's annoying, and it slows you down while working in Xcode? Here's how to remove it.
Copy this Xcode plugin to the following directory:
~/Library/Application Support/Developer/Shared/Xcode/Plug-ins/
You should create the directories if needed.
Enjoy!
Mac OS X Hints
http://hints.macworld.com/article.php?story=20120507052042668