Nav bar button/dropdown display issue

[Hawkeye]

Hi,

I'm having a small display issue with my navbar buttons and dropdowns.

If you look at this image --
[attachment=0:2hr3e8a2]nav dispaly error.jpg[/attachment:2hr3e8a2]
-- you'll see that the highlighted 'About' button is extending just past the bottom edge of the navbar background image. This in turn seems to push the menu extending down from the 'Topics' button down by a similar amount. Even more perplexing, the flyout submenus next to 'Tangents' also show a similar drop with each subcategory.

Any ideas? I've compared several files that I thought I might have changed, but I can't find anything I've introduced that's causing the problem. Still, the Streamline 30 demo page clearly shows the dropdowns nesting just under the nav bar with no gap or overlap, and the flyouts are all perfectly level -- so obviously I've mad a boo-boo.