Last week I upgraded to Mac OS X Leopard from Tiger. Having a backup of my important
files I simply choose the upgrade option. And 1.5 hours later or so I had a
working Leopard install.
My main problem with Leopard is that X11 has changed dramatically. So much that I
have real problems using wmii-3 for xterms.
The improvements in Terminal.app saved Leopard from a rollback to Tiger because of X11.
Terminall.app has become usable now. Especially after I issued the
defaults write com.apple.Terminal FocusFollowsMouse -string YES
command.
I also quickly decided to put the dock back to something reasonable with the
defaults write com.apple.dock no-glass -boolean YES
killall Dock
commands.