The Subject Info page is still using a transitional doctype. Sorry for the info about transitional below, shows me I should take extra reading time when I'm posting early in the A.M.
Try removing the single space right at the end before the closing tag. It's the only difference I can find between that call and another valid page. The strange thing is the validation is pointing out the error in a weird spot.
The "attributes construct error" is an XML error if I'm right.
[s]Actually, they aren't the same Doctype. If I look at the Subject Info page you are using an XHTML Transitional Doctype. However, on the page in question you have a Strict Doctype in there. The code on that page outputs a little weird as well.
Replace the Doctype on that page with the below and you should be okay:[/s]
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"