We do not have a good answer to this problem.
We will try the suggestions. Thanks!

It is not a problem related to desktops or laptops but rather browsers, box content, and screen definition...

Somehow the boxes at the entrance page have a life and change according to their content.

They also show different in different browsers.

Right now all boxes at the entrance page look perfect from here (MS Explorer browser.)

Please give us more details and we will see what we can do.
Thanks