Vertical w/rollover Navigation with CSS

[VicR]

I'm trying to get 60 x 20 plain colored buttons to work with a vertical
navigation bar, but there is a blue line between the buttons. I have no idea
where the blue line is coming from, and therefore no idea how to get rid of it.
Any ideas?

see the sample:
[url]http://www.vicrauch.com/_verticalCSSnavigation/VerticalCSSNav.htm[/url]

Thanks
Vic

[VicR]

I found the problem. the "<Span> tag was on the next line for the one button that was too big. I have no idea why this new line in code would create a larger space, but it does.