For those who both use EditLive! and were very quick to upgrade to Leopard, you might want to grab the latest early access build of EditLive! With old builds on Tiger, our toolbar didn't respond well to the darker background color:

(Click for full size version)

Fortunately, Apple introduced some new rendering styles for buttons with Leopard that we could leverage to get a much nicer, much more OS X look:

(Again with the clicking)

We need to take some time to further tweak the UI on Leopard in a few places (and improving a number of the icons would be good) but this takes care of the biggest problem we had on Leopard. If you're wondering, a new button capsule is started each time a toolbar separator is specified in the config file.