The SUPER+D shortcut to minimise all windows works on some computers but not on others, perhaps due to the upgrade process carrying over previous keyboard shortcut settings??? As part of the 12.04 upgrade process, SUPER+D should be mapped to 'minimise all windows' so that this shortcut works on both computers that are upgraded as well as on fresh installs.
The SUPER+D shortcut to minimise all windows works on some computers but not on others, perhaps due to the upgrade process carrying over previous keyboard shortcut settings??? As part of the 12.04 upgrade process, SUPER+D should be mapped to 'minimise all windows' so that this shortcut works on both computers that are upgraded as well as on fresh installs.