Opera and IE

I’ve been told that my Monads in Ruby page isn’t showing up in Opera or IE. It passes HTML validation, and the only non-validating CSS is a simple -moz-border-radius applied to the comment buttons.

I suspect this may be true of the site as a whole, since those pages currently use the normal site template. Please, anyone have clues as to what is going on? Is it some Javascript thing? An XHTML issue?

hoodwink.d enhanced