This release is without a doubt the most graphically pleasing and polished with regard to the installer - very nice! The depsolver appears to be fantastically faster too, i.e. minutes faster. Only one point I noticed so far: After the language selection screen, the screen redraws or blacks (or something odd like that) when Next is clicked. Only happens after that screen.
This has been the case for a while and is a side-effect of something in the firstboot module stuff. Chris -- might be something to look for as you rework firstboot.
There's not really much we can do here, as changing the language means we have to destroy the current UI and reload it for the new translation to take effect. In order to cut down on the number of people who see the flash, I've modified anaconda to not reload the UI if the selected language is the same as the one currently in use. This should help most people out.