Try this, remove the .fill class:
.navbar-inner {
padding-left: 20px;
padding-right: 20px;
background-color: white; /* 2/2/12 was #2c2c2c; */
background-repeat: none; /*2/6/12 was repeat-x; */
-webkit-border-radius: 0px;
-moz-border-radius: 0px;
border-radius: 0px;
background-image:none; /* 2/6/12 required to avoid black border and
gray border */
/* height:90px; */ /* 2/6/12 controls navbar height, required to
avoid gray border, but if height is not spec'd then nav bar icon works
correctly */
}
and please look at http://visualwave.com/bootstrap/mls-fluid2.html,
p'raps you can tell me why the gray line...
HTH Tom