The dropdown in the browser navigation bar shows every site that I've been to . How do I clear it?

Menu>more>History>Clear History says my history iscleared but when I go back to my browser and tap the navigation field it's all still there - every site I've visited for days! Ditto if I go to Menu>More>Settings and clear the forms, history, cache, and cookies there!
So whatare those settings clearing? Can this be done without YET ANOTHER 3rd party app? (besides, I don't want to give some app written by god-knows-who access to my browsing history!)

So how do I clear the browser navigation history? Thanks in advance! (Droid Incredible 2.2)