If you do not like the new design of the dock in Leopard, and would like to get Tiger's dock back, this is possible. You can recover Tiger's presentation, via the terminal. Launch the terminal and enter the following command line:
defaults write com.apple.dock no-glass -boolean YES
Once validated, close and re-open your user session, or relaunch the dock but entering the following command line:
killall Dock
To recover the new Leopard's dock you will need to enter this command line:
defaults write com.apple.dock no-glass -boolean NO.
[translation by Linathael]
