I agree: Butler is a fantastic MUST-have app; better than Quicksilver or other options (which I've tried but require too many keystrokes to get at what I want). However, at least one feature — key combination in any app. to open a given folder in Finder — seems broken under Leopard. For this reason I've reverted back to Tiger. Seems they know of it and are promising a fix in a few days.

I'd also suggest that they make this shareware. It's worth it, and I'd be more than happy to pay for all their hard work.