On every upgrade, the texlive package comes with a massive amount of upgrade messages. Some examples:

pre_upgrade: echo " NB: The file $updmapfile has not been changed"
Why do I need to know this?

post_install and post_upgrade:
echo " ------------------------------------------------------------------"
echo " Welcome to TeXLive 2008! "
echo ""
echo " * The installation now goes to /usr instead of /opt/texlive."
echo ""
echo " * PLEASE read the documentation at"
echo " http://wiki.archlinux.org/index.php/TeXLive";
echo " ------------------------------------------------------------------"

Why do I have to see that on every upgrade? My installation of texlive has been in /usr since the beginning, I don't even know of /opt. This scriptlet should check for the previous version of the package, if it was before the first version in /usr, it should display the message, otherwise not. The wiki documentation link is useful for post_install, but not post_upgrade. The whole Welcome header should be skipped, other packages don't have that either (welcome to glibc, welcome to gcc, welcome to gnome-session...)

You also might want to redirect some stdout messages to /dev/null, if there's no error, you're not interested in any messages. Errors have output on stderr and will get printed on console then. If you really want to keep the status messages (echo "texlive: creating all formats"), you might want to remove the texlive prefix and use "echo -n" to print the "done." on the same line afterwards.