Just had a minor, yet confusing, breakthrough. The only change I've made to the script which is responsible for building those comments pages is the removal of an include link for an entirely different Javascript. Now that I've added it back, I can vote. Of course, I don't want that Javascript running since those puritanical cocksuckers at Websnappr have blacklisted me
and the thumbs don't appear when you mouseover the links anymore. All I have to do is figure out why that completely unassociated Javascript makes my rating script happy. Fuck me.