[eluser]Twisted1919[/eluser]
Nope , the first/default controller will be shown even if you don't have .htaccess at all .
If you append index.php in front of your controllers , it works ? If it does , then indeed is a .htaccess issue and you must find your right .htaccess solution .
I tested 1.7.2 on all posible environments and had no problem at all , even with php 5.3.0 .