No matter what I do to modify or remove the dashed border around the page menu bar, it still appears there when you center the page menu. This appears to only happen with the menu centered, not when it is left or right aligned. Any ideas on how to fix this? Thank you!

Nevermind! Found it in css.php.

which version of WP and Atahualpa?

The latest of both - 2.8.1 of WP and 3.4.1 of Atahualpa. I found the fix in css.php. Thanks though!

Can you explain what you did?

Oh woops, sorry Yes, I deleted line 2496 from css.php:

div#menu1 {
border: dashed 1px #ccc;
}

Instead of deletinh the lines in css.php (which won't carry over if you upgrade atahualpa in the future) instead just add the following to ATO->Add HTML/CSS Inserts->Css Inserts

div#menu1 {
border: solid 1px #ccc;
}