Hi Claustrophobe, nice shortcut there Cmd+Ctrl+D is very nice indeed.
How about disabling shortcut like the Cmd+Option+D that shows and hides the Dock, annoyingly for me the same shortcut is regularly used in Photoshop so I had to disable the System one.
To activate, disable, or add system shortcuts just access System Preferences > Keyboard and Mouse, then click on the Keyboard shortcut tab on top of the window.