Disabling Command + Arrow scrolling When I press Command &#8984;+&uarr; or Command &#8984;+&darr; on OS X 10.8.2 (Mountain Lion), it scrolls all the way to the top or the bottom of a window. 

The problem is, in some programs, this results in crazy uncontrollable scrolling behavior, because for whatever reason the program doesn't signal to the OS that it's hit the end of its scrolling. It's driving me nuts. 

Is there any way to turn off this behavior? I've searched System Preferences > Keyboard settings to no avail.
If your intention is to globally override this behaviour, this will do the trick:

Create a file called DefaultKeyBinding.dict and write on it the following:

    {
      "@\UF700" = "noop:";
      "@\UF701" = "noop:";
    }


@\UF700 is the Unicode value for Command+Up while
@\UF701 is for Command+Down.

Save it and place it under ~/Library/KeyBindings/. If the folder doesn't exist, just create it.

A different approach would be to override this shortcuts on each of the Applications you're having troubles with, assigning the problematic shortcuts to the Application's function you usually don't use, for instance.