Hi Woody,
Changing each menu item to a percentage will get rid of the space, and I think it will be a better way to go about it than you have. Here's the exact post with instructions on doing so (you can always find it by searching for "percentage" in this thread):
http://www.zen-cart.com/forum/showthread.php?p=390897
Sorry, I can't follow css without looking at its' visual expression, so I can't offer advice on your method. I'd reload the original stylesheet, and follow the instructions above.
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