Description of problem: clicking the release notes button doesn't pop up the viewer, but logs to one of the tty's the message : viewer missing at /usr/lib/anaconda/iw/release_notes_viewer_gui.py a dozen or so times and then gives up.
How are you doing your install? Can you check if /usr/lib/anaconda/iw/release_notes_viewer_gui.py exists on tty2?
nfs install. From memory, it didn't exist. I'm 99% sure I looked to see if it existed.
Does it still happen with current trees (I couldn't reproduce when I tried to back before OLS, but I'm not ruling out something weird)