twitter/bootstrap — Issue #1666: A textarea/input with span12 class in flexible layout should have a box-sizing(border-box)
Author: lartus
Created: 2012-02-03 15:06:49+00:00
State: open

When you put a span12 class to a textarea or an input it adds the padding to the 100% width :
it could be avoided by the following code :
.row-fluid {
input[type="text"], textarea {
&.span12 { .box-sizing(border-box); }
}
input[type="text"].span12 { height: 28px; }
}