Disable Dock Bouncing
The bouncing Dock icons are a nice GUI feature but for some people they’re just really annoying. You can disable the Dock icon bounce notifications in Mac OS X by using the command line, so launch Terminal and enter the following:
Disable Dock Bouncing:
defaults write com.apple.dock no-bouncing -bool TRUE
Re-enable Dock bouncing by entering these commands:
defaults write com.apple.dock no-bouncing -bool FALSE
Note that these commands don’t just disable the launch bounce animation, it disables all bouncing from the icons within the Dock, so iTunes, iChat, etc, will no longer bounce to notify you of an event going on in that application. If you only want to disable the opening Dock animation you can simply turn off animation within the Dock preferences by unchecking the ‘Animate Opening Applications’ option.