Wordpress header in vBulletin style

[Cutsizzle]

I wish to use a wordpress header on vBulletin and for the most part it has worked. I have a couple issues though with staying logged in + the sub navigation bar.

-Visually wise, it works alright on PC's....however it looks odd on my MAC.

On MAC in "Safari"

On MAC in "FireFox"

On PC's it "looks" perfect. As the sub navigation bar doesn't give a problem and it's lined up just fine.

Also I believe there is a cookie path problem because when you select the skin it's hard to log-in, takes multiple attempts, and then when you are logged in, you'll be on the skin and then navigate to a thread, and it'll take you to your last skin and it jumps back and forth.

Any help? I am willing to pay to get this resolved.