I have the exact same problem as described here: http://forum.bytesforall.com/showthread.php?t=17700

When I change the size of the window of my site, the image overlaps

my site: www.familiaviagem.com.br

WordPress 3.9.1

Atahualpa 3.7.15


I read your answer, but I am still lost. Im pretty new to this so I think I need a step by step help...

You posted "change the <img class from 'size-large' to 'size-full' "
and it seemed to solv the problem, but I dont know WHERE I should make this change.. Is it in a file or in the ATO? I cant find...

step 1 disable all plugins and test it again.

done, but problem remains

How are you displaying your main page so that there are two columns?
If you set it to display only one column does the problem remain?