Milonic JavaScript Menu

It's happening on some machines. I've seen it on two. I'm using IE 6.0.2.

Genevois, do you see it on my site too?
http://www.proinsurance.com/site_map

Your site navigation loads instantly for me.

What are the Milonic Menu files... does this matter? I purchased the product if that's what you're wondering.

The images on rollover load very slowly in IE but not Netscape, Firefox, etc. This is actually something I've seen with other javascript too. Has anyone run into this?

You can view it here:
http://www.proinsurance.com/new_site

Thanks for any and all help!