Visual Studio 10 CSS HTML5

I'm using a transform property and assigned the attribute scale(1)but visual studio throws an error that says not a valid value for the transform property. I installed the web standards , and CSS IS 2.2.1 but dose not work . any suggestions ?

ul#blah h2 {
    color: #386077;
    cursor: pointer;
    font-size: 20px;
    ;
    transform: scale(1);
    transition: all 0.15s ease-in 0s;
    z-index: 101;
}