Leopard (Mac OS X 10.5) to Snow Leopard (Mac OS X 10.6) upgrade problems / fixes 3

This blog post cover problems that I faced after upgrading my MacBook Pro from Leopard to Snow Leopard. 1. Firefox v 3.5.3 crashes. – Firefox started to crashed randomly. Especially when I tried to access sites with flash content. Solution: Few google results told me to re-install firefox and then install latest flash plugin. But ...