If the CyberDuck plugin is not working for you, (you can’t right-arrow to see the bookmarks) make sure that you changed the default nicknames of the bookmarks.

Probably if you open the Console you’ll find some “missing nickname” errors there.

[March19] [March 19] 7:31:22 PM Quicksilver[6037] Error: No 'Nickname' key for favorite:

I found the answer in this google group Can’t right-arrow into Cyberduck – Blacktree: Quicksilver | Google Groups .