Think we might know what is going on here; we think you're running a case-sensitive file system.
Do this. Find your drive icon on the desktop, right click, and choose get info. See what it says under "format" ... or if you're comfortable with it... open Disk Utility, and look at your system drives specs.
Our software isn't compatible with a case sensitive file system; you'll have to re-install Leopard as a "Mac HFS Journalled" partition type.
Hechando un vistazo a perfil de sistema parece ser que tienen razon pero yo no se como instalar el SO de esa forma. Tengo que hacer una particion al disco duro para hacerlo? Perdon por mi torpeza llevo varios años usando mac y no tengo ni idea de que es esto y que debo hacer.Un saludo