Thank Garann, I tested this on my server and had problems.
Here is what my dir tree looks like:
/
/public_html/
/public_html/images/
I have mydomain.com point to /public_html/
and have images.mydomain.com point to /public_html/images/
So my css file points to:
/images/css/style.css
but when I point it to:
[images.mywebsite.com...]
it stops working.
It works fine for all other images and everything, its just that my hover menus stop working.
Does it maybe have something to do with the fact that I apply a csshover.htc behavior? I'm not quite sure what it does but it does allow my hover menus to work.