PLS HELP: comments.php disrupts header

Whenever one of my pages calls for comments.php (e.g. single post pages), a javascript that I use for a cool sliding doors feature in my header stops working.

My comments.php was copied and pasted from the Kubrick theme so I could allow for the new WP threaded comments feature. Everything else seems to be working ok.

When I delete the line that calls comments.php from the page template, the header works perfectly.

Any ideas?

(site is summertomato.com — to get past the Maintenance Mode screen use ID: friends Pass: access –sorry for the work around)