HTML attribute "tabindex" not working

Hello,

Running Safari 3.0.4 and the HTML attribute "tabindex" does not seem to work as it should when its related to inputs that are "submit" buttons.

Here is an example:
<form method="post" action="index.php">

Sample:

Sample 2:

</form>

So the outcome for me is when I try to tab to the submit button it tabs to the browsers URL bar instead.

Anyone run into this problem?