I have tried using this code in the terminal to turn off the reply animation in Mail
defaults write com.apple.Mail DisableReplyAnimations -bool true
It doesn't work for me. I turn off Mail, enter the above in terminal, press return, turn on mail. Same hideous distracting reply animation.
I have also checked at the application Tinker Tools--but there is no turn off Mail animation there that I can find.
Any help would be appreciated!