box-model rule not respecting box-sizing property

[jstrimpel]

We are using https://github.com/jzaefferer/grunt-css to add csslint to our build process. According to https://github.com/stubbornella/csslint/wiki/Beware-of-box-model-size:

"If the box-sizing property is specified, then the rule does not emit any warnings for the above conditions as it assumes you know what you're doing."

However, the CSS below is still throwing error box-model rule errors.

.pa-header {
box-sizing: border-box;
background: url('../images/bg_hdr_grad.gif') repeat-x;
height: 33px;
width: 982px;
border-top: #b2c5d3 1px solid;
border-right: #b2c5d3 1px solid;
border-left: #b2c5d3 1px solid;
}

[L6:C3]

Using height with border-top can sometimes make elements larger than you expect. Don't use width or height when using padding or border. (box-model)
[L7:C3]
Using width with border-right can sometimes make elements larger than you expect. Don't use width or height when using padding or border. (box-model)
[L8:C3]
Using width with border-left can sometimes make elements larger than you expect. Don't use width or height when using padding or border. (box-model)
Task "csslint:base_theme" failed. Use --force to continue.

Aborted due to warnings.

[nzakas]

That definitely seems broken, I'll look into it.