I have text inputs with 1px padding that I sometimes put 1 px borders on. I want all text inputs to fill the same vertical space, borders or not. To achieve that, I created a "don't have borders, but fill space like you do" class with border: none and 2px of padding:
.BorderInputNone {
border: none;
padding: 2px;
}
This worked in IE8, but in IE7, there were visible borders around the input.
EDIT: I fixed it by using border: transparent.
.BorderInputNone {
border: 1px solid transparent;
padding: 1px;
}