The UI in Cyberduck has an absurdly low update rate and feels very slow, almost unusable, as a consequence. Here's a video showing it:

​http://www.youtube.com/watch?v=X1_i1__Eb-w

Now that I think of it, I can't recall Cyberduck ever having a responsive UI. I guess I've kind of been thinking "oh yeah it's coming sometime, they're working on it, for sure" but I'm starting to realize maybe people don't even consider it being a problem that needs to be addressed? Anyway, it's one the things that just makes Cyberduck feels cheap. Maybe that's why I haven't donated yet. *nudge nudge*...

(Seriously, if Cyberduck had a proper UI that felt snappy, you'd have a donation coming your way, guaranteed...)