merlinpress on "CSS3 Transitions"

Hello,

Read elsewhere in the forum that WP strips out certain vendor specific CSS3 code.
Was wondering if anybody knew if this includes the transitions property?

I'm trying to add a subtle animation to my menu, was just wondering if my code is wrong or it's being stripped out by WP? If so, any idea when they're going to start enabling this functionality?

CSS:

#primary a {
background:#fff;
color:#999999;
text-decoration:none;
padding:2px;
-webkit-transition-property: background;
-webkit-transition-duration: 0.2s;
-webkit-transition-timing-function: ease-in;
}

#primary a:hover {
background:#B0DD9E!important;
color:#666666;
padding:2px;
-moz-border-radius:4px;
-webkit-border-radius:4px;
border-radius:4px;
}

From http://merlinmason.co.uk

Am I missing something?

Thanks for any help!