Hello-
When using your CSS the gradient does not show in safari. Stranger still, is I remove your code and add in accepted webkit gradient settings and it still wont show or be transparent? Does someone have a fix for this yet? I tried the alternate valencia css and got the same response.
Your Code: background: #111111 url('-webkit-gradient(linear, left top, left bottom, from(#ffffff), to(#111111))');
Accepted Code: background: -webkit-gradient(linear, left top, left bottom, from(#ffffff), to(#111111));