while using the original GuMax 3.3 i noticed that the menu bar "Main Page Community Portal..." when one choice is selected then the live below is overlay ed.
fix:
change height from 22 to 23 in gumax_template.css
/gmack#gumax-p-navigation-wrapper
{
/* border: 1px solid red; /* debuging */
height: 23px;
padding-right: 1px;
}