This is a CSS reset for the Bootstrap Navbar component. In the future I'd like to see them deploy an .unstyled class. Until then this'll do.

bootstrap-navbar-css-reset.css

.navbar-inner,
.navbar-fixed-top .navbar-inner,
.navbar-fixed-bottom .navbar-inner,
.navbar-static-top .navbar-inner {
	background: none;
	border: none;
	-webkit-border-radius: 0;
	border-radius: 0;
	-moz-box-shadow: none;
	-webkit-box-shadow: none;
	box-shadow: none;
	filter: none;
	padding: 0;
}
.navbar { margin-bottom: 0; }
.navbar .nav { margin: 0; }
.navbar .brand,
.navbar .nav > li > a {
	margin: 0;
	padding: 0;
	text-shadow: none;
}
.navbar .btn-navbar,
.navbar .btn-navbar:hover {
	background: none;
	-webkit-border-radius: 0;
	border-radius: 0;
	-moz-box-shadow: none;
	-webkit-box-shadow: none;
	box-shadow: none;
	margin: 0;
	padding: 0;
	text-shadow: none;
}