Safari Select Box Styling Bug?

I'm getting a wierd bug in Safari 5.0.5 for windows. When I apply my styles the down arrow in the select box button disappears. I tried removing classes and it seems multiple classes trigger the bug. Any help would be much appreciated. You can see an example at http://jsfiddle.net/fbsRY/2/

You cannot reliably style select elements using CSS as browsers try to stick to the operating systems defaults. If you MUST style these elements, you'll probably have to find a JS based alternative.

Not a full solution, but I did find more details about the problem at http://www.codingforums.com/showthread.php?t=179464. It seems that it might be a bug related to the Windows Classic Theme. I'm kind of a geek that way. Love my flat gray interface :)