Disable Growl popup notifications in Cyberduck
Cyberduck is a great free FTP client for Mac OS X, but on my portable Mac’s 13″ screen the Growl popup notifications really drive me crazy as they appear on each server connection and transfer completion. Oddly enough, if you look around in the Cyberduck preferences, you won’t find an option to disable the Growl notifications, and this has to be done through the command line instead.
To disable the popup Growl notifications in Cyberduck, type the following command:
defaults write ch.sudo.cyberduck growl.enable false
You can reverse this and get the Growl popup notifications back by typing:
defaults write ch.sudo.cyberduck growl.enable true
Continue to enjoy Cyberduck, with or without Growl notifications!
Update: As several readers pointed out, you can also just disable Growl notifications within the System Preferences on a per app basis.

Uh why not just use Growl’s preference pane instead?
http://drp.ly/13VJ51
Dom is right – growl preferences are adjusted in growl. The command line option is to disable Growl support in Cyberduck (which is probably used for debugging).
Thank you!