Through some trial and error, it seems to me that this is caused by the two lines
near the beginning of your "box" script (http://menu.fo/js/box). I'm not sure exactly why, but due to some quirk in IE7's page rendering hiding the 3 InfoContainer divs and then showing the first is causing the Etika text to be pushed down.
There are probably other solutions to this, but one possibility is to change the positioning of the InfoContainer divs to absolute (which just removes them from the page flow). You can do this by adding
right: 400px; /* width - right margin */
for .InfoContainer in your css file. You might have to make some adjustments to get the divs exactly where you want them.