IE6 is killing me!

[freddygusto]

Hi guys,
I just finalized a website template for a company. It´s fine for Firefox and IE7 and 8. URL is http://constantinsandu.com/intranet/index.html
I was just told some guys in there still use IE6!!! And I am having a problem with the PNG/repeat issues.
With the logo PNG issue I think I can manage it from what Ive seen in Google searches.
But with the repeat issue I have no idea how to go about it.. can somebody please point me in the right direction?

Many thanks
fred

[jason_zeng]

I want to say is that IE6 and IE7 is the difference between the css, you may find the distinction between them, or find the difference between IE and firefox, you should be able to find the answer.