In the following, you have the code that gives the Skate Park link the extra spacing. You should remove it:
Code:
ul.links li a.shim{
padding:0 89px;
}
Now the padding will be even, but the nav bar will not be wide enough. One solution to this is to increase the padding between elements until it -is- wide enough. At the moment you have within the style definition
Code:
ul.links li a:link, ul.links li a:visited{
(a bunch of styles)
padding:0 27px 0 29px;
}
Increase the numbers in the padding line until the bar is as wide as you require. 0 38px 0 38px seems to get pretty close, but if you increase either by another pixel then it goes down to the next line... you may need to create a special class for one of the items so that it lines up properly.
There's possibly a better solution, but this is the quickest version to achieve what you're looking to do without a major re-structuring.