Hi Melissa,
Thank you for the reply! Yes, I tried that option, but the problem remains. I think it has something to do with the slider in the front page (I use the built-in in the theme slider option), as it seems to be the one that has that big space.
I will keep investigating how to solve it. The internal pages with sliders work fine. So maybe it is something about the size of the photos in the home page.
Diego