I'm curious as to whether that resulted because there was a carriage return inserted in the middle of the very last comment closing tag, or if someone tried to use HTML comments in something that wasn't HTML....It doesn't seem that one borked comment tag would screw all the others up.
Going to have to test that....
Edit: Looks like the html, as presented works. Firefox, at least, ignores a carriage return in the code. They borked it up somewhere else, probably by mixing HTML comments with whatever language they were using to process the orders.
Edit Redux: Looks like IE 7 doesn't ignore the malformed comment, however, and does display the rest of the comments due to it. So maybe it is just crappy HTML.