Look at line 40 in p7AMM-01.css
Default is padding: 6px 3px;
.p7AMM ul li {
list-style-type: none;
vertical-align: middle;
display: inline-block;
position: relative;
padding: 0px 0px;
}
~~~ updated note~~~
You weren't referring to the white space within the menu. Apologies. You mean the next section down, near Contact Details?
This is a Project 7 set up. P7 forum is down; Gerry said they were working on it. In the meantime he will answer in email: support@projectseven.com