deixo aqui a solução....
mere moments after the problem, I have found the solution!
1) OK, first, uninstall php4, php5, apache, and apache2 and all directly related packages.
2) reinstall php5 and apache2 related packages as well as php5-mysql
3) in /etc/apache2/apache2.conf, uncheck the lines related to AddType
4) CLEAR FIREFOX'S CACHE! HERE IS WHERE MY ERROR WAS!
5) sudo apache2ctl restart