Quirky Internet Explorer rendering

I have to test out my website quickly on Internet Explorer for Windows on campus machines (since I use a Mac). This is what my page is supposed to look like:

my page has all of its images completely loaded, and the CSS renders properly

But under IE, a lot of things go missing:

My page under Internet Explorer does not have its backgrounds fully loaded, so certain parts of the page are missing.

My head is gone!

I've also noticed some really weird mouse-hover behavior with Internet Explorer 6. I'll have to research this some more. Most of the people here know to use Firefox, but the vast majority of users are still stuck with IE 6. *sigh*