Thanks for changing that around.
In the /templates/beez_20/css/position.css file, at line 81, you'll see:
#wrapper2 .item-page
{
max-width:660px
}
Add the overflow:visible there and put a semicolon at the end of the max-width line, so it looks like:
#wrapper2 .item-page
{
max-width:660px;
overflow:visible;
}
I used the Chrome Developer Tools to narrow this down. You can inspect the CSS and make changes on the fly, and it makes things easier to see how changes take effect, just so you know. Firefox has "Firebug", IE9 has it's own built in tools, and so do Safari and Opera, just so you know and want to look into it further.
Hope this helps!
Alex