This may be a feature instead of a strange artifact, but there's a "half-tab" thing (for lack of a better term) between the Home tab and the other Page tabs in the Page Menu Bar. It doesn't bother me too much, but I've had a couple of people look at the site and ask me what it is, and whether it's supposed to be something functional (it appears to be clickable).

The site is www.deniseyamada.com, and I'm using Atahualpa 3.5.1 and WordPress 3.0.

If anybody knows anything about this, and how to remove it, or change it, I'd appreciate it!

Thanks.

Okay, I found the answer. I had an untitled page in the site. Everything's okay now.

You should probably apply this bug fix as well. It affects drop down menus especially in IE.