The menu boxes are there. I think this is a problem between IE9 and cufon.
Someone else will have to verify this and offer advice, though.
My "diagnosis" is a calculated guess and the only things I could suggest are search the web for cufon fixes or use another source for your fonts.
Your wordpress stats script at the bottom of the page is below the close </html> tag. Nothing should be below the close </html> tag.